calculate the [oh-] of 115.40 ml of a buffer initially consisting of 0.1491 m n2h4 and 0.2152 m n2h5no3 after addition of 0.00180 mol of hcl. assume that no volume change occurs after addition of the acid. the kb of n2h4 is 8.90e-7

Answers

Answer 1

The conjugate acid of N2H4, NH3+, and Cl- ion is created when HCl is introduced to the buffer solution by a reaction with the weak base N2H4. According




to the equation below, this leads to a change in the buffer system's equilibrium: (aq), HCl (aq), NH3+ (aq), Cl- (aq), and H2O (l) are the products.We must first estimate the moles of N2H4 and N2H5NO3 that were previously present in the buffer solution in order to compute the concentration of OH- in the buffer solution following the addition of HCl:N2H4 moles are equal to buffer volume (L) times its molarity (0.11540 L x 0.1491 mol/L = 0.0171 molN2H5NO3 moles are equal to buffer volume (L) times its molarity (0.11540 L x 0.2152 mol/L = 0.0248 mol).HCl being a potent oxidizerSince the buffer solution contains an acid, we can suppose that all of the HCl completely dissociates there. As a result, the moles of HCl supplied are equal to the moles of H+ ions created by the dissociation of HCl:H+ ion moles = 0.00180 molThe change in N2H4 and NH3+ concentration brought on by the addition of HCl must then be calculated. The ultimate concentration of N2H4 and NH3+ can be determined by using the following formula, assuming that the volume of the buffer solution remains constant after the addition of HCl:Moles of H+ ions equal 0.1491 mol/L x (0.11540 L) - 0.00180 mol = 0.0163 mol in the equation [N2H4]final = [N2H4]initial.Final = [NH3+] + (NH3+)0 mol/L x (0.11540 L) + 0.00180 mol + initial + moles of H+ ions = 0.00180 molthe reaction of using the equilibrium expression



learn more about According   here :


https://brainly.com/question/28049887



#SPJ11


Related Questions

write a balanced ionic equation for this acid-base reaction: 2csoh(aq)+h2so4(aq)→

Answers

The balanced ionic equation for the acid-base reaction between 2 CSOH (aqueous) and H2SO4 (aqueous) can be written as follows:

2 CSOH(aq) + H2SO4(aq) → 2 CSH(aq) + H2O(l) + SO4^2-(aq)

In this equation, CSOH represents a strong base, sodium hydroxide (NaOH), and H2SO4 represents a strong acid, sulfuric acid. When they react, the hydrogen ion (H^+) from H2SO4 combines with the hydroxide ion (OH^-) from CSOH to form water (H2O).

The remaining ions, sodium (Na+) and sulfate (SO4^2-), remain dissociated and appear as ions in the balanced equation. This equation represents a neutralization reaction where the acidic and basic components combine to form a salt (CSH) and water.

Know more about acid-base reaction here

https://brainly.com/question/10224396#

#SPJ11

Choose one astronomer from the chart to research. Create a poster/trifold board about the astronomer you chose. Make sure to include information about where and when they were born, what they did as astronomers, why what they researched mattered and how it affects how we view space and our planet today. Then, you will make a video of yourself as a living museum presentation. It should be at least 1 minute long, where you pretend to be that astronomer, and you will talk about yourself (the astronomer). Pay attention to the fact that the minimum length will only get you a 3 in the Content and Development area of the rubric. Most of your speech should be memorized, but you may use your poster and/or notecards to help guide you, if needed. You can email your video to your teacher or send a shareable link. Remember to read the rubric below so you can know how it will be graded. When you are ready, upload it replacing the “Lastname” in the saved document name with your last name. Be sure to include your sources in MLA formatting.

Answers

The planets in our solar system move in predictable patterns, as early astronomers found.

They were able to develop the rules of planetary motion and make precise predictions about the positions of the planets through careful observation and calculation. Later scientists might build on this work to grasp gravity, space, and the nature of our universe more fully. These discoveries are still being built upon today as we explore the solar system and beyond. It is useful to know how the planets move because it makes it easier to navigate satellites and spacecraft. In the end, the discoveries made by early astronomers have had a significant influence on how we perceive the universe and our role in it.

To know more about planetary motion, here

brainly.com/question/4978861

#SPJ1

--The complete Question is, What did early astronomers discover about the movements of the planets, and why does it matter to our understanding of space and our planet today?  --

how many cycles of the synthesis pathway are needed to produce palmitic acid, c15h31cooh?

Answers

Answer:

5

Explanation:

Palmitic acid has 16 carbon atoms and is a saturated fatty acid. The synthesis of palmitic acid occurs via the fatty acid synthesis pathway, also known as the "de novo" fatty acid synthesis pathway.

To synthesize palmitic acid, 8 cycles of the fatty acid synthesis pathway are needed. Each cycle adds two carbon units to the growing fatty acid chain, The synthesis of palmitic acid occurs via the fatty acid synthesis pathway, also known as the "de novo" fatty acid synthesis pathway. starting with acetyl-CoA (a 2-carbon unit) and continuing with malonyl-CoA (a 3-carbon unit). After 8 cycles, a 16-carbon saturated fatty acid, palmitic acid (C16H32O2), is produced, along with 7 molecules of CO2 and 14 molecules of NADPH.

Learn more about Palmitic acid    here:

https://brainly.com/question/29770129

#SPJ11

describe how the ocean currents, temperature and gas concentrations are directly related to those of the atmosphere.

Answers

The ocean and the atmosphere are closely interconnected, and changes in one can have significant impacts on the other. There are several ways in which ocean currents, temperature, and gas concentrations are directly related to those of the atmosphere:

Ocean currents influence the atmosphere: Ocean currents play a major role in shaping the Earth's climate by transporting heat and moisture around the globe.

Ocean temperature influences the atmosphere: The temperature of the ocean can affect the amount of heat and moisture that is transferred to the atmosphere. Warmer ocean temperatures can lead to the development of more intense storms and hurricanes, while cooler ocean temperatures can result in drier and more stable weather patterns.

Gas concentrations in the ocean influence the atmosphere: The ocean plays a significant role in absorbing carbon dioxide from the atmosphere, which helps to regulate the concentration of greenhouse gases in the atmosphere.

Atmospheric temperature influences ocean currents: The temperature of the atmosphere can affect the density and circulation of the ocean's currents. For example, the Gulf Stream is a warm ocean current that flows along the east coast of North America, and it is influenced by the warm air masses that move north from the Caribbean Sea.

Learn more about atmosphere

https://brainly.com/question/26767532

#SPJ4

calculate the ph of a 0.150 m piperidine (c5h10nh) solution (kb = 1.3x10-3).

Answers

The pH of a 0.150 M piperidine solution (C5H10NH) with a Kb of 1.3x10^-3 is 11.72. This indicates that the solution is basic.

To calculate the pH of a 0.150 M piperidine (C5H10NH) solution with Kb = 1.3 x 10^-3, we'll first determine the pOH and then find the pH. Piperidine is a weak base and will undergo an equilibrium reaction with water:
C5H10NH + H2O ↔ C5H10NH2+ + OH-
We can use the Kb expression:
Kb = [C5H10NH2+][OH-] / [C5H10NH]
Since the initial concentration of piperidine is 0.150 M, we'll assume x mol/L of it reacts to form C5H10NH2+ and OH- ions. The equilibrium concentrations will be:
[C5H10NH] = 0.150 - x
[C5H10NH2+] = x
[OH-] = x
Now, substitute these values into the Kb expression:
1.3 x 10^-3 = (x)(x) / (0.150 - x)
Solve for x to find the concentration of OH- ions:
x ≈ 0.0053 M
Now, calculate the pOH:
pOH = -log10[OH-] = -log10(0.0053) ≈ 2.28
Finally, find the pH using the relationship:
pH + pOH = 14
pH = 14 - 2.28 ≈ 11.72
So, the pH of the 0.150 M piperidine solution is approximately 11.72.

To know more about  piperidine visit:

https://brainly.com/question/31315744

#SPJ11

using the letters on the image, identify each component of the liquid waste set-up.A-- funnelB-- primary containerC-- waste labelD-- secondary container

Answers

According to the given information the correct answer is to identify each component of the liquid waste set-up using the letters on the image:

A-- Funnel: This is a device that is used to guide the liquid waste into the primary container without spilling.

B-- Primary container: This is the first container that collects the liquid waste. It can be a glass or plastic bottle, a jug, or any other appropriate container that is labeled for hazardous waste.

C-- Waste label: This is a label that indicates the contents of the primary container. It should include information such as the name of the chemical, the date it was collected, and the person who collected it.

D-- Secondary container: This is a larger container that is used to collect multiple primary containers. It should be labeled with the same information as the primary container, as well as a warning label indicating that it contains hazardous waste.

To know more about lipid set up visit:

https://brainly.com/question/28481240

#SPJ11

how many miles are in 4.90grams of hydrogen gas?

Answers

Methane, also known as natural gas, can be replaced with hydrogen, a clean fuel. It is the most prevalent chemical element and is thought to make about 75% of the universe's mass.

Thus, Numerous hydrogen atoms can be found in water, plants, animals, and, of course, people here on methane.

Although it is found in almost all living things' molecules, it is extremely rare as a gas and only makes up less than one part per million by volume

A number of sources, including natural gas, nuclear energy, biogas, and renewable energy sources like solar and wind, can be used to methane and hydrogen.  The difficulty lies in producing enormous amounts of hydrogen gas to methane.

Thus, Methane, also known as natural gas, can be replaced with hydrogen, a clean fuel. It is the most prevalent chemical element and is thought to make about 75% of the universe's mass.

Learn more about Methane, refer to the link:

https://brainly.com/question/28933327

#SPJ1

how much fluoride (in milligrams) is present in a 100 mg sample of bone with this fluoride concentration?

Answers

The amount of fluoride (in milligrams) is present in a 100 mg sample of bone with this fluoride concentration is 7mg per 100mg.

In this systematic review investigation, the necessary information was gathered by searching PubMed, ScienceDirect, IranMedex, SID, MEDLIB, and Magiran databases using the terms drinking water fluoride, fluoride concentration, fluorosis, dent*, Iran*, and their Persian equivalents. After removing the remaining publications that were unrelated to the study's aims, 29 articles out of 617 were ultimately taken into consideration. The pertinent data were carefully examined and extracted, and then they were compiled in extraction tables and manually examined. The diagrams were created using the Excel 2007 programme.

In 29 papers, the fluoride contents of drinking water were determined using 4434 samples of surface, ground, and tap water resources that were gathered over the course of 236 months across all seasons in 17 regions of Iran. An average fluoride concentration of 0.43 0.17 ppm was calculated, with zero and 3.06 serving as the minimum and maximum values. Tap water has the lowest concentration. Only three provinces had fluoride concentrations that met the international standard. Estimates place the frequency of fluorosis at 61%, with just 1% of cases being considered severe.

Learn more about Fluoride concentration:

https://brainly.com/question/13473226

#SPJ4

Complete question:

Fluoride lon in Drinking Water Sodium fluoride is added to drinking water in many municipalities to protect teeth against cavities. The target of the fluoridation is hydroxyapatite,

a compound in tooth enamel. There is concern, however, that fluoride ions in water may contribute to skeletal fluorosis, an arthritis-like disease.

a. Write a net ionic equation for the reaction between hydroxyapatite and sodium fluoride that produces fluorapatite,

b. The EPA currently restricts the concentration of

in drinking water to

. Express this concentration of

in molarity.

c. One study of skeletal fluorosis suggests that drinking water with a fluoride concentration of

for

20 years raises the fluoride content in bone to

, a level at which a patient may experience stiff joints and other symptoms. How much fluoride (in milligrams) is present in a 100 mg sample of bone with this fluoride concentration?

why would it be unwise to simply add 10 drops of 6 m hcl immediately in step 1? what could go wrong?

Answers

Adding too much HCl too quickly could cause the formation of a large amount of precipitate, making it difficult to observe the reactions and determine the presence or absence of the ions.

The beginning of nucleation is a crucial phase of precipitation. The construction of an interface with the solution is implied by the production of a solid particle. This involves energy changes dependent on the relative surface energy created between the solid and the solution and the dissolving reaction free energy (endothermic or exothermic process followed by a rise in entropy). Without adequate nucleation sites or in the absence of favourable energy shifts, there is no precipitation, and the solution remains supersaturated.

When a compound's concentration exceeds its solubility, precipitation may result. This could result from changes in temperature, solvent evaporation, or solvent mixing. Strongly supersaturated solutions produce precipitation more quickly.

A chemical reaction may lead to the precipitate's production. A white barium sulphate precipitate is created when a barium chloride solution combines with sulfuric acid. A yellow precipitate of lead(II) iodide is created when a potassium iodide solution combines with a lead(II) nitrate solution.

Learn more about Precipitate:

https://brainly.com/question/30386923

#SPJ4

Which of the following correctly pairs the polyatomic ion with Its formula?
a. hydroxide, OH b. ammonium, NH4-
c. chlorate, ClO3- d. carbonate, CO3-

Answers

The correct pairing of polyatomic ions with their formula is:d. carbonate, CO3²⁻ Therefore, option d is the correct pairing of the polyatomic ion with its formula.

The polyatomic ion hydroxide has the formula OH⁻, where O represents oxygen and H represents hydrogen. This ion consists of one oxygen atom and one hydrogen atom, and it has a negative charge due to the extra electron.The polyatomic ion ammonium has the formula NH4⁺, where N represents nitrogen and H represents hydrogen. This ion consists of one nitrogen atom and four hydrogen atoms, and it has a positive charge due to the lack of one electron.

The polyatomic ion chlorate has the formula ClO3⁻, where Cl represents chlorine and O represents oxygen. This ion consists of one chlorine atom and three oxygen atoms, and it has a negative charge due to the extra electrons.The polyatomic ion carbonate has the formula CO3²⁻, where C represents carbon and O represents oxygen. This ion consists of one carbon atom and three oxygen atoms, and it has a negative charge due to the extra electrons.

Learn more about polyatomic ions here:

https://brainly.com/question/12852496

#SPJ11

Which statement(s) concerning the van der Waals constants a and b is true? Select all that apply. - The magnitudes of a and b depend on pressure. - The magnitude of a relates to attractions between molecules, whereas b relates to molecular volume.
- The magnitude of a relates to molecular volume, whereas b relates to attractions between molecules.
- The magnitudes of a and b depend on temperature.

Answers

The statement that is true concerning the van der Waals constants a and b is that the magnitudes of a and b depend on temperature.

The magnitude of a relates to attractions between molecules, whereas b relates to molecular volume. However, the magnitudes of a and b are independent of pressure. These constants are used in the van der Waals equation to correct for the deviations from ideal gas behavior. The value of accounts for the intermolecular attractions, while the value of b accounts for the volume occupied by the molecules themselves. The temperature dependence of these constants reflects the change in intermolecular forces and molecular volumes with temperature.


The statement(s) concerning the van der Waals constants a and b that are true are as follows:

- The magnitude of a relates to attractions between molecules, whereas b relates to molecular volume.

Van der Waals constants a and b are dependent on the specific substance, and they do not depend on pressure or temperature. The constant 'a' represents the strength of the attractive forces between molecules, while 'b' accounts for the effective molecular volume, taking into account the finite size of the molecules. Therefore, only the second statement is true.

To know more about intermolecular attractions, visit:

https://brainly.com/question/10626096

#SPJ11

how many grams of potassium chloride are needed to prepare 0.750 l of a 1.50 m solution of kcl in water?

Answers

Approximately 83.87 grams of potassium chloride (KCl) to prepare 0.750 liters of a 1.50 M solution in water.

To determine the number of grams of potassium chloride (KCl) needed to prepare a 1.50 M solution in water, we can use the formula:

Molarity (M) = moles of solute / volume of solution in liters

First, we need to calculate the moles of KCl required. Rearranging the formula, we get:

moles of solute = Molarity × volume of solution

moles of KCl = 1.50 M × 0.750 L

moles of KCl = 1.125 moles

The molar mass of potassium chloride (KCl) is approximately 74.55 g/mol.

Now, we can calculate the grams of KCl needed using the equation:

grams of KCl = moles of KCl × molar mass of KCl

grams of KCl = 1.125 moles × 74.55 g/mol

grams of KCl = 83.87 grams (rounded to two decimal places)

Learn more about potassium chloride here:

https://brainly.com/question/15979985

#SPJ11

For each of the following pairs, indicate which substance possesses the larger standard entropy. Part A 1 mol of P4(g) at 300 ∘C, 0.01 atm, or 1 mol of As4(g) at 300 ∘C, 0.01 atm 1 of at 300 , 0.01 , or 1 of at 300 , 0.01 1 mol of P4(g) at 300 ∘C, 0.01 atm 1 mol of As4(g) at 300 ∘C, 0.01 atm Part B 1 mol of H2O(g) at 100 ∘C, 1 atm, or 1 mol of H2O(l) at 100 ∘C, 1 atm 1 of at 100 , 1 , or 1 of at 100 , 1 1 mol of H2O(g) at 100 ∘C, 1 atm 1 mol of H2O(l) at 100 ∘C, 1 atm Part C 0.5 mol of N2(g) at 298 K, 20-L volume, or 0.5 mol C2H4(g) at 298 K, 20-L volume 0.5 of at 298 , 20- volume, or 0.5 at 298 , 20- volume 0.5 mol of N2(g) at 298 K, 20-L volume 0.5 mol C2H4(g) at 298 K, 20-L volume Part D 100 g Na2SO4(s) at 30 ∘C or 100 g Na2SO4(aq) at 30 ∘C 100 at 30 or 100 at 30 100 g Na2SO4(s) at 30 ∘C 100 g Na2SO4(aq) at 30 ∘C

Answers

A thermodynamic parameter known as "standard entropy" gauges a substance's level of disorder or randomness at a standard state, which is typically 1 atm of pressure and 298.15 K of temperature. The units for the standard entropy are joules per mole per kelvin and are represented by the sign S°.

Part A: The larger standard entropy would belong to 1 mol of As4(g) at 300 ∘C, 0.01 atm since arsenic has a larger atomic size and a greater number of electrons compared to phosphorus. This results in more possible configurations for the atoms, leading to a higher entropy value.

Part B: The larger standard entropy would belong to 1 mol of H2O(g) at 100 ∘C, 1 atm since gases have higher entropy than liquids due to their increased molecular motion and a greater number of possible microstates.

Part C: The larger standard entropy would belong to 0.5 mol C2H4(g) at 298 K, 20-L volume since it is a larger molecule with more possible configurations, resulting in a higher entropy value.

Part D: The larger standard entropy would belong to 100 g Na2SO4(aq) at 30 ∘C since the dissolution of Na2SO4 in water increases the number of possible configurations of the ions and water molecules, leading to a higher entropy value.

To know more about Standard Entropy visit:

https://brainly.com/question/30507551

#SPJ11

what happens to chlorine in clo3 in the following redox reaction clo3 i cl i2 a a it is oxidized b b its oxidation number changes from 6 to 1 c c its total oxidation number change is 6 d d its total oxidation number change is 6

Answers

The correct answer is: It is oxidized. Oxidation number (also known as oxidation state) is a concept used in chemistry to describe the hypothetical charge that an atom would have if all its bonds were completely ionic.

In the given redox reaction, which can be represented as:

ClO3- + Cl- → Cl2

The chlorine in ClO3- is being reduced, while the chlorine in Cl- is being oxidized. Let's analyze the changes in Oxidation number for chlorine in this reaction:

Oxidation state of chlorine in ClO3- (chlorate ion) is +5.

Oxidation state of chlorine in Cl- (chloride ion) is -1.

In the reaction, the chlorine in ClO3- is reduced to chlorine gas (Cl2), where the oxidation state of chlorine changes from +5 to 0. This means that chlorine in ClO3- is being reduced or its oxidation state is decreasing.

Learn more about Oxidation number here:

https://brainly.com/question/29263066

#SPJ11

an unknown gas effuses at a rate which is 1.60756 times the rate of carbon dioxide. what is the molar mass of the unknown gas? what gas do you think this gas might be? could these differences in effusion rates be used to purify carbon dioxide from this other unknown gas?

Answers

The rate of effusion of a gas is inversely proportional to the square root of its molar mass.

Using this relationship, we can determine the molar mass of the unknown gas that effuses 1.60756 times faster than carbon dioxide. Let the molar mass of the unknown gas be x. Then, we have:

(rate of CO2) / (rate of unknown gas) = sqrt(MM of unknown gas) / sqrt(MM of CO2)

Substituting the given values, we get:

1 / 1.60756 = sqrt(x) / sqrt(44.01 g/mol)

Solving for x, we get the molar mass of the unknown gas to be 27.97 g/mol.

Based on its molar mass, the unknown gas could possibly be nitrogen (28.01 g/mol) or oxygen (32 g/mol), but additional tests would be needed to confirm its identity.

The differences in effusion rates could be used to separate carbon dioxide from the unknown gas, but it would require a time-consuming process of repeated distillation and effusion to achieve high purity.

Other separation methods, such as adsorption or membrane filtration, may be more practical for large-scale purification.

learn more about molar mass here:brainly.com/question/12127540

#SPJ11

how does the stylist remove excess water from the hair before applying the neutralizer?

Answers

Before applying the neutralizer, the stylist will typically remove excess water from the hair by gently squeezing it with a towel or using a hair dryer on a low heat setting.

This helps to ensure that the hair is not overly saturated with water, which could dilute the neutralizer and impact the effectiveness of the perming process. Additionally, removing excess water can help to prevent the hair from becoming too dry or brittle during the perming process. Overall, the goal is to strike a balance between ensuring the hair is adequately moisturized and avoiding excessive water retention that could negatively impact the perm.

To remove excess water from the hair before applying the neutralizer, the stylist gently squeezes the hair with a towel, using a blotting motion. This ensures that the hair is not overly damp, allowing the neutralizer to work effectively and achieve optimal results.

Visit here to learn more about perm brainly.com/question/30562468

#SPJ11

list atoms commonly found in biological molecules that are often hydrogen-bond acceptors.a) carbon b) oxygen c) nitrogen d) B and C e) All of the above.

Answers

The atoms commonly found in biological molecules that are often hydrogen-bond acceptors are b) oxygen and c) nitrogen. Therefore, the correct answer is oxygen and nitrogen.

Hydrogen bonding is a type of intermolecular attraction between a partially positively charged hydrogen atom and a partially negatively charged atom. In biological molecules, hydrogen bonding is a crucial force that plays a significant role in stabilizing the structure and function of proteins, DNA, RNA, and other biomolecules.

The most common hydrogen-bond acceptors found in biological molecules are oxygen and nitrogen atoms. These atoms are often part of functional groups such as hydroxyl (-OH), carbonyl (>C=O), carboxyl (-COOH), and amino (-NH2) groups, which are present in various biomolecules such as proteins, carbohydrates, lipids, and nucleic acids.

Carbon atoms, on the other hand, are not typically hydrogen-bond acceptors. Although carbon can form covalent bonds with other atoms, it is not electronegative enough to attract hydrogen bonds.

Click the below link, to learn more about Hydrogen bond acceptors:

https://brainly.com/question/16854739

#SPJ11

how much work is done when a gas expands into a vacuum (called free expansion)?

Answers

Answer:

the answer is that no work (zero) is done when a gas expands into a vacuum (free expansion).

Explanation:

When a gas expands into a vacuum (free expansion), no external pressure is applied to the gas, so the gas expands without performing any work on the surroundings.

According to the first law of thermodynamics, the change in internal energy (ΔU) of a system is equal to the heat added to the system (Q) minus the work done by the system (W):

ΔU = Q - W

Since no work is done by the gas during free expansion, the work done by the system is zero:

W = 0

Therefore, the change in internal energy of the system is equal to the heat added to the system:

ΔU = Q

Therefore, the answer is that no work is done when a gas expands into a vacuum (free expansion).

Read more about Work Done

https://brainly.in/question/5499258

When a gas expands into a vacuum, which is also known as free expansion, no external work is done. This is because there is no opposing pressure from the surroundings that the expanding gas has to overcome. The gas expands freely, and the volume increases without any energy transfer to or from the surroundings.

The scenario, the gas expands freely, and the volume increases without any energy transfer to or from the surroundings. To understand this concept, we need to look at the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. In the case of free expansion, there is no work done by the system, therefore the change in internal energy is solely due to the heat transfer. Therefore, the amount of work done when a gas expands into a vacuum is zero. This is because no external force is acting on the gas to oppose its expansion, and hence there is no energy transfer in the form of work.  In conclusion, free expansion of a gas into a vacuum does not involve any work, as there is no opposing pressure from the surroundings that the expanding gas has to overcome. The gas expands freely, and the volume increases without any energy transfer to or from the surroundings.

learn more about vacuum here.

https://brainly.com/question/30623006

#SPJ11

Two moles of oxygen and two moles of neon will occupy the same volume if the temperature and pressure are constant.
T/F

Answers

True. According to Avogadro's Law, equal volumes of any gases at the same temperature and pressure contain the same number of moles.

So, two moles of oxygen and two moles of neon will occupy the same volume if the temperature and pressure are constant. According to Avogadro's Law, equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.

Since both oxygen and neon are gases, and the given amounts of each gas are in moles, they both contain the same number of molecules. Therefore, if the temperature and pressure are constant, two moles of oxygen and two moles of neon will occupy the same volume.

To know more about Avogadro's Law visit :-

https://brainly.com/question/4133756

#SPJ11

Given 0.38 grams of N2 how many grams of NaN3 are needed?

Answers

The balanced reaction is 3 N₂ + 2 Na → 2 NaN₃. 0.588 grams of Nitrogen required 19.3 grams of NaN₃.

According to the balanced equation, 3 moles of N₂ react with 2 moles of Na to produce 2 moles of NaN₃. Therefore, we need to convert the given mass of N₂ to moles and then use the mole ratios to calculate the mass of NaN₃ required.

First, calculate the number of moles of N₂:

Moles of N₂ = mass of N₂ / molar mass of N₂

Moles of N₂ = 0.38 g / 28.014 g/mol

= 0.01355 mol

According to the mole ratios in the balanced equation, 2/3 as many moles of NaN₃ as moles of N₂.

Moles of NaN₃ = (2/3) x moles of N₂

Moles of NaN₃ = (2/3) x 0.01355 mol

= 0.00904 mol

Mass of NaN₃ = moles of NaN₃ x molar mass of NaN₃

Mass of NaN₃ = 0.00904 mol x 65.012 g/mol

= 0.588 g

To learn more about the balanced reaction, follow the link:

https://brainly.com/question/14280002

#SPJ1

the pka of lactic acid is 3.86. what is the ph of a buffer in which the lactic acid and sodium lactate have equimolar concentration?

Answers

The pH of the buffer in which the lactic acid and sodium lactate have equimolar concentration is equal to the pKa of lactic acid, which is 3.86.

How to solve for the pH

The acid dissociation constant for lactic acid is given as pKa = 3.86, so Ka can be calculated as:

Ka = 10^(-pKa) = 10^(-3.86) = 1.87 x 10^(-4)

Substituting these values into the Henderson-Hasselbalch equation, we get:

pH = pKa + log([base]/[acid])

pH = 3.86 + log(x/x)

pH = 3.86

Therefore, the pH of the buffer in which the lactic acid and sodium lactate have equimolar concentration is equal to the pKa of lactic acid, which is 3.86.

Read more on lactic acid here:https://brainly.com/question/490148

#SPJ1

Which of the following ingredients is the powder used to form an acrylic nail? a) polymer b) monomer c) methacrylic d) methacrylate.

Answers

The powder used to form an acrylic nail is polymer.

Explanation: When forming acrylic nails, a mixture of liquid monomer and polymer powder is used. The liquid monomer reacts with the polymer powder to create a pliable substance that can be shaped onto the natural nail or a nail form.

As the substance dries, it hardens into a durable acrylic nail. While both the liquid monomer and polymer powder are necessary for creating acrylic nails, the powder is the key ingredient that provides the bulk of the material and the structure of the nail.

Learn more about acrylic nail here:

https://brainly.com/question/31919119

#SPJ11

(b) Figure 4 shows the heating curve for water | Page Tamperee & 100- 30. -10 M N Figure 4 Heating time (min) (i) Give the names of the intermolecular forces of attraction in the segments. MN

Answers

The intermolecular forces of attraction in the segment MN are the intermolecular forces of attraction present in ice which are hydrogen bonding and van der Waals forces.

What is the heating curve for water?

The temperature of a given volume of water changes as heat is added at a constant pace, as seen by the heating curve for water.

The temperature of the water does not change throughout a phase change creating a plateau on the graph.

The heating curve for water shows the following parts:

heating of ice at less than 0°C to ice at 0°Cmelting of ice at 0°C to water at 0°Cheating of water at 0°C to water at 100°Cvaporization of water at 100°C to steam at 100°Cheating of steam at 100°C to higher temperatures

Learn more about heating curve at: https://brainly.com/question/28290489

#SPJ1

State the formula for the phenotypic variance in a population, give a brief definition of each term?
Interpret the meaning of an H2 value (broad-sense heritability) that approaches 1.0
Interpret the meaning of the H2 value (broad-sense heritability)that approaches 0.0

Answers

The formula for the phenotypic variance in a population is the sum of the genetic variance and the environmental variance.

The genetic variance refers to the variation in a trait that can be attributed to genetic factors, while the environmental variance refers to the variation that can be attributed to environmental factors such as nutrition, climate, or social factors. Phenotypic variance can be used to understand the overall variation in a trait within a population and can be a valuable tool for predicting the potential impact of selective breeding or other genetic interventions.

When an H2 value (broad-sense heritability) approaches 1.0, it means that the majority of the variation in a trait is due to genetic factors. This suggests that the trait is highly heritable and that selective breeding or other genetic interventions are likely to be effective in producing desired changes in the population.

An H2 value that approaches 0.0, on the other hand, suggests that the variation in the trait is largely due to environmental factors. This means that selective breeding or other genetic interventions are likely to have limited impact on the trait in question, and that other approaches (such as environmental interventions) may be more effective in producing desired changes. In general, the higher the H2 value, the greater the potential impact of genetic interventions on a trait.

Learn more about phenotypic variance here:

https://brainly.com/question/29976438

#SPJ11

a chemist titrates of a propionic acid solution with solution at . calculate the ph at equivalence. the of propionic acid is .

Answers

The titration of propionic acid with NaOH is a strong acid-strong base titration. At equivalence, the number of moles of NaOH added is equal to the number of moles of propionic acid in the solution.

We can use this fact to calculate the pH at equivalence.

The balanced equation for the reaction is:

CH3CH2COOH + NaOH → CH3CH2COO-Na+ + H2O

From the equation, we can see that the acid and the base react in a 1:1 molar ratio. Therefore, the number of moles of NaOH added is equal to the number of moles of propionic acid in the solution. We can use the formula for the concentration of the acid to calculate the number of moles of acid:

C = n/V

where C is the concentration, n is the number of moles, and V is the volume of the solution.

The volume of the solution is not given, so we cannot calculate the number of moles directly. However, we know the concentration of the acid and the volume of the NaOH solution used. We can use the formula for the concentration of the NaOH solution to calculate the number of moles of NaOH:

C(NaOH) = n(NaOH)/V(NaOH)

where C(NaOH) is the concentration of the NaOH solution, n(NaOH) is the number of moles of NaOH, and V(NaOH) is the volume of the NaOH solution used.

Substituting the values given, we get:

0.1000 M = n(NaOH)/0.02500 L

n(NaOH) = 0.00250 mol

Since the acid and the base react in a 1:1 molar ratio, the number of moles of propionic acid is also 0.00250 mol.

We can use the formula for the pH of a weak acid-strong base titration to calculate the pH at equivalence:

pH = pKa + log([A-]/[HA])

where pKa is the acid dissociation constant, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the acid.

The pKa of propionic acid is 4.87. At equivalence, the concentration of the conjugate base is equal to the concentration of the acid, which is 0.00250 mol/L. Substituting these values, we get:

pH = 4.87 + log(0.00250/0.00250)

pH = 4.87

Therefore, the pH at equivalence is 4.87, which is slightly acidic.

learn more about moles here:brainly.com/question/30885025

#SPJ11

Which type(s) of field(s) exert force on all objects?

Answers

The type of fields exert force on all objects are; Gravitational fields, Electric fields, Magnetic fields, and Nuclear forces.

Every object with mass exerts a gravitational force on every other object with mass. The force of gravity is a universal force that acts on all objects, and it decreases as the distance between the objects increases.

Charged particles create electric fields, which can exert forces on other charged particles. Electric fields can also induce a force on neutral objects that have a net electric dipole moment.

Moving charged particles create magnetic fields, which can exert forces on other charged particles that are in motion. Magnetic fields can also interact with objects that have a magnetic dipole moment.

The strong nuclear force and the weak nuclear force are responsible for holding atomic nuclei together. These forces act on all particles that make up the nucleus, such as protons and neutrons.

To know more about magnetic fields here

https://brainly.com/question/23096032

#SPJ1

sulfur trioxide dissolves in water, producing h2so4. how much sulfuric acid can be produced from 13.3 ml of water (d

Answers

Approximately 39.39 mL of sulfuric acid can be produced from 13.3 mL of water.

To calculate the amount of sulfuric acid that can be produced from 13.3 mL of water, we need to determine the stoichiometry of the reaction between sulfur trioxide (SO3) and water (H2O). The balanced chemical equation for the reaction is:

SO3 + H2O -> H2SO4

According to the stoichiometry of the reaction, one molecule of SO3 reacts with one molecule of H2O to produce one molecule of H2SO4. Since we are given the volume of water (13.3 mL), we need to convert it to moles using the molar volume of water.

The molar volume of water is approximately 18.01528 mL/mol.

13.3 mL of water * (1 mol/18.01528 mL) = 0.7383 mol of water

From the stoichiometry of the reaction, we can conclude that 1 mole of water will produce 1 mole of sulfuric acid. Therefore, the amount of sulfuric acid produced will be the same as the amount of water used:

0.7383 mol of H2SO4

To convert this to a volume, we need to multiply the number of moles by the molar volume of sulfuric acid. The molar volume of sulfuric acid is approximately 98.086 g/mol.

0.7383 mol of H2SO4 * (98.086 g/mol) = 72.36 g of H2SO4

Finally, to convert the mass to volume, we need to use the density of sulfuric acid. The density of sulfuric acid varies depending on the concentration, temperature, and pressure. For concentrated sulfuric acid at room temperature, the density is typically around 1.84 g/mL.

72.36 g of H2SO4 * (1 mL/1.84 g) = 39.39 mL of H2SO4

Learn more about sulfuric acid here:

https://brainly.com/question/29303579

#SPJ11

Which of the following could form an ionic bond with an anion? hg22 no2– so32– ar

Answers

An ionic bond is formed between a cation (positively charged ion) and an anion (negatively charged ion).

To determine which of the given options could form an ionic bond with an anion, we need to identify the cations among them.

The options provided are:

a. Hg2^2+

b. NO2^–

c. SO3^2–

d. Ar

Among these options, the only option a, Hg2^2+, is a cation with a positive charge. The other options, NO2^–, SO3^2–, and Ar, are either anions or non-ionic elements.

Therefore, the cation Hg2^2+ could form an ionic bond with an anion. An ionic bond is formed between a cation (positively charged ion) and an anion (negatively charged ion). Among the options provided, the only one that could form an ionic bond with an anion is:

Hg22+ (mercury(II) cation)

The NO2–, SO32–, and Ar (argon) ions are all negatively charged (anions), and they would not form an ionic bond with other anions.

Learn more about  ionic bond here:

https://brainly.com/question/11527546

#SPJ11

describe a typical bacterium

Answers

Bacteria are unicellular microorganisms that are found in a wide variety of environments, including soil, water, and the human body. Although there is considerable variation in the shape, size, and structure of different bacterial species, a typical bacterium can be described as follows:

Size: Bacteria are generally much smaller than other types of cells, with typical sizes ranging from 0.5 to 5 micrometers in length.

Shape: Bacteria can take on a variety of shapes, including spherical (cocci), rod-shaped (bacilli), and spiral (spirilla or spirochetes).

Cell structure: Bacteria are prokaryotic cells, meaning that they do not have a membrane-bound nucleus or other organelles. Instead, their genetic material is contained in a single circular chromosome that is located in the cytoplasm. Bacterial cells are surrounded by a cell wall that provides structural support and protection, and many species also have a capsule or slime layer that helps to protect them from environmental stresses.

Metabolism: Bacteria are highly diverse in their metabolic capabilities, with some species able to produce energy through photosynthesis, while others rely on chemosynthesis or fermentation. Bacteria are also able to break down a wide variety of organic and inorganic compounds, and many species play important roles in the cycling of nutrients in ecosystems.

Reproduction: Bacteria reproduce asexually by binary fission, in which a single cell divides into two identical daughter cells. Some species are also able to exchange genetic material through processes such as conjugation, transformation, or transduction, which can lead to the rapid spread of antibiotic resistance or other traits within bacterial populations.

Overall, bacteria are a highly diverse and adaptable group of microorganisms that play critical roles in many ecological and biomedical processes.

Short version: Bacteria are unicellular microorganisms that are found in diverse environments. They are typically small in size, ranging from 0.5 to 5 micrometers in length, and can take on various shapes including spherical, rod-shaped, and spiral. Bacteria are prokaryotic cells, meaning that they lack a membrane-bound nucleus or other organelles, and their genetic material is contained in a single circular chromosome located in the cytoplasm. They have a cell wall that provides structural support and protection, and can produce energy through photosynthesis, chemosynthesis, or fermentation. Bacteria reproduce asexually through binary fission and can exchange genetic material through conjugation, transformation, or transduction. Bacteria are a highly diverse and adaptable group of microorganisms that play important roles in many ecological and biomedical processes.

A typical bacterium is a unicellular microorganism that belongs to the domain Bacteria. Bacteria can be found in a wide range of environments such as soil, water, and atmosphere. They are very small in size, with a typical bacterium measuring from 0.5 to 5 micrometers in diameter. Bacteria have a relatively simple structure, with no membrane-bound organelles or a nucleus enclosed in a membrane. Instead, the bacterial DNA is concentrated in the nucleoid region, which is not surrounded by a membrane. The cell membrane of bacteria is made up of a lipid bilayer and contains embedded proteins that are important in transport of nutrients in and out of the cell. Some bacteria have the ability to move via flagella or pili. Many bacteria have a protective cell wall which also helps to maintain their shape and protect them from the surrounding environment. Additionally, they reproduce asexually by binary fission, which is a type of cell division. Some bacteria have evolved the ability to survive in extreme environments such as high temperatures, pressure, and acidity.

how many moles in 1.5 x10^16 molecules of bf3

Answers

There are 2.49 x 10^-8 moles in 1.5 x 10^16 molecules of BF3.

To determine the number of moles in 1.5 x 10^16 molecules of BF3, we first need to know the Avogadro's number, which is 6.022 x 10^23 molecules per mole. We can use this information to convert the number of molecules to moles:

1.5 x 10^16 molecules of BF3 x 1 mole/6.022 x 10^23 molecules = 2.49 x 10^-8 moles of BF3

Therefore, there are 2.49 x 10^-8 moles of BF3 in 1.5 x 10^16 molecules of BF3.
To calculate the number of moles in 1.5 x 10^16 molecules of BF3, follow these steps:

Step 1: Recall the Avogadro's number, which is 6.022 x 10^23 molecules/mole.

Step 2: Use the formula to convert the number of molecules to moles:

Moles = (Number of molecules) / (Avogadro's number)

Step 3: Plug the given number of molecules (1.5 x 10^16) into the formula:

Moles = (1.5 x 10^16) / (6.022 x 10^23)

Step 4: Divide the numbers to find the moles:

Moles = 2.49 x 10^-8

So, there are 2.49 x 10^-8 moles in 1.5 x 10^16 molecules of BF3.

Learn more about Avogadro's number

brainly.com/question/28812626

#SPJ11

Other Questions
According to Locke, simple ideas become complex ideas through the process of ____.A. associationB. deductive logicC. sensing primary qualitiesD. reflectionE. recombination Under which circumstance is the interest rate guaranteed within a market value adjusted annuity?a. when the contract has been held for the period specified in the policyb. for the entire length of the contractc. neverd. when the cash value has reached a stated minimum amount the ____ of a telescope is a measure of its ability to increase brightness. When referencing field names within an expression, surround the field name with ____.a. (parentheses)b. {curly brackets}c. Quotation marksd. None of these What elements have an ambiguous reflection in douard Manet's A Bar at the Folies-Bergre?a. the bar topb. the barmaidc. liquor and wine bottlesd. all of the other answerse. none of the other answers Erikson would suggest that 80-year-old ____ has achieved integrity.a. Elmer, who is highly self-conscious,b. Christine, who is highly self-affirming,c. Harold, who has good self-recognition skills,d. Francis, who has excellent self-monitoring skills, Which of the following types of information differs between alternatives and can affect the future?a.Relevantb.Predictablec.Irrelevantd.Historical roll a fair die twice. suppose a and b are two independent events such that a=rolling a 3 in the first time and b=rolling a 3 in the second time. find p (a b). caruso is said to have made a crystal chandelier shatter with his voice. this is a demonstration of The anti federalists supported the constitution and felt that the U.S. needed a strong central government In Exercises 1-3, describe the domain of the function the nurse is managing the care for a postoperative client. how does the nurse demonstrate advocacy? poster about urban heat island (geography) At which phase(s) is it preferable to obtain chromosomes to prepare a karyotype?a. Early prophase.b. Late telophase.c. Anaphase.d. Late anaphase or early telophase.e. Late prophase or metaphase. Which of the following statements does not reflect one of Elliss three basic musts? a. "If others fail to treat me well, they must be miserable human beings."b. "Others must like me and appreciate my talents or else I am a failure."c. "I must be kind to others or else I wont be a good person."d. "I must get what I want when I want it or I wont be able to stand it." which factor is most important for determining the density of a parcel of air? T/F: if you upload photos to a nas device, everyone on the network can access them. when the nutrient intake falls between the rda and ul, it is likely that the intake is The nurse is planning to assess a clients near vision. Which technique should be used?A. have the client stand 20 feet from a wall chart and read the letters after covering one eye B. shine a light on the bridge of the nose C. ask the client to move the eyes in the direction of a moving finger D. have the client read newspaper print held 14 inches from the eyes x^2+8x-5=0x^2 + 12x + 4 = 0x^2 + 18x + 90 = 02x^2 12x 9 = 04x^2 + 8x 9 = 0solve by completing the square root.