Yes I agree that N₂ is the limiting reagent.
Generally, limiting reagent is defined as a substance that does not allow a chemical reaction to take place completely. Basically, if in a chemical reaction limiting reagent is involved , then the atoms/molecules/ions of the other reactant with which it (limiting reagent ) combines will remain free or will remain unreacted.
Yes, I absolutely agree that N₂ is a limiting reactant because you can clearly see that in the right box that after the reaction N₂ gets completely consumed ( not left over ) and is not present in excess. So, N₂ is limiting reactant.
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5.0 g of iron is reacted with 5.0 g of water according to the chemical equation shown below. which one of the following statements is false? question 17 options: 1) 6.91 g of fe3o4 are produced. 2) 2.85 g of h2o are left over. 3) mass is conserved in this reaction. 4) water is the limiting reactant.
The statement that is false is that water is the limiting reactant. Option 4
What is a chemical reaction?A chemical reaction is a process that involves the breaking of chemical bonds in one or more substances, and the formation of new bonds to create different substances with different chemical properties.
We know that the reaction equation is;
3Fe + 4H2O ----> Fe3O4 + 4H2
Number of moles of Fe = 5 g/56 g/mol
= 0.089 moles
Number of moles of water = 5 g/18 g/mol
= 0.28 moles
If 3 moles of Fe reacts with 4 moles of water
0.089 moles of Fe will react with 0.089 * 4/3
= 0.012moles
Thus Fe is the limiting reactant
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Please answer all questions provided in the pictures below.
Answer:
2Na + Cl2 -------> 2 NaCl ... only add at sodium and
product 2 coficient
N2 + 3H2 --------> 2NH3 ...... only add at Hydrogen molecule and it's product 2 and 3 respectively.
The equations can be balanced as -
2Na + Cl₂ = 2 NaCl
2N₂ + 3H₂ = 2 NH₃
What is a Balanced Chemical Equation?A balanced chemical equation is an equation where the number of atoms of each type in the reaction is the same on both reactants and product sides.
An unbalaced chemical equation is not an accurate representation of a chemical equation and thus requires balancing.
The law of conservation of mass is the governing law for balancing a chemical equation.
The law states that ‘mass can neither be created nor be destroyed in a chemical reaction’
Hence, the total mass of substances before the reaction should be equal to the mass after the reaction is complete.
Therefore, The equations can be balanced as -
2Na + Cl₂ = 2 NaCl
2N₂ + 3H₂ = 2 NH₃
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Within most of the temperature range that we find liquid water on Earth, what happens to the density of that water as its temperature decreases?
Within most of the temperature range that we find liquid water on Earth, the density of water increases as its temperature decreases.
As water cools down, the molecules move closer together, making the water more dense. This is due to the fact that cooler water molecules have less kinetic energy and move slower, allowing them to pack together more tightly. However, when water reaches around 4 degrees Celsius, its density starts to decrease due to the formation of a unique crystal structure caused by hydrogen bonding. This is why ice floats on water, as its density is lower than that of liquid water at temperatures below 4 degrees Celsius.
However, at very cold temperatures near the freezing point of water, the density of the substance starts to decrease due to the formation of ice crystals.
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You have a balloon with a volume of 3.2 L at standard air pressure of 760 mm Hg. You submerge the balloon in one foot of water that is the same temperature as the room. Underwater, the pressure increases to 783 mm Hg. What is the new volume of the balloon? Explain your thinking and math to receive full credit.
Let's start by setting up the initial conditions:
We have a balloon with a known volume (3.2 L) and the pressure inside the balloon is at atmospheric pressure (760 mm Hg). When submerging in water, the pressure increases to 783 mmHg.
Next, we need to use the ideal gas law (P1 * V1 = P2 * V2) to solve for the new volume of the balloon underwater:
760 * 3.2 = 783 * V2
Now, we can solve for the new volume of the balloon:
V2 = (783 / 760) * 3.2
V2 = 3.39 L
So, the new volume of the balloon is 3.39 L, which is a slight increase in volume due to the increase in pressure underwater.
We can use the given formula (P1 * V1 = P2 * V2) to solve for the volume change in any situation where there is a change in pressure and volume. This is a very common and important equation in chemistry and physics, and it's important to be able to understand and use it effectively.
A gaseous mixture at a total pressure of 1.50 atm contains equal molar amounts of He, Ne, and Ar. At constant temperature CO2 gas is added to the mixture until the total pressure is 3.00 atm. Which of the following is a correct statement concerning partial pressures after the CO2 addition?
a. The partial pressure of He has doubled.
b. All four gases have equal partial pressures.
c. The partial pressure of Ar has doubled.
d. The partial pressure of CO2 is three times that of Ne.
The partial pressure of CO2 is three times that of Ne. The correct statement is option (d).
The initial gaseous mixture contains equal molar amounts of He, Ne, and Ar at a total pressure of 1.50 atm. Therefore, each gas has a partial pressure of 0.50 atm.When CO2 gas is added to the mixture, the total pressure becomes 3.00 atm. Since the temperature is constant, the volume of the mixture remains the same. According to Dalton's law of partial pressures, the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas in the mixture. Therefore, the sum of the partial pressures of He, Ne, Ar, and CO2 must be equal to 3.00 atm.Since the amount of He, Ne, and Ar in the mixture has not changed, their partial pressures should remain the same after the addition of CO2 gas. Therefore, options (a) and (c) are incorrect.Option (b) is also incorrect because the partial pressures of He, Ne, Ar, and CO2 cannot be equal. The partial pressures of He, Ne, and Ar were equal in the initial mixture, but the partial pressure of CO2 is different because it was added later.Therefore, the correct statement is option (d). The partial pressure of CO2 is three times that of Ne. We can use the mole fraction of each gas to calculate their partial pressures. Since the initial mixture contained equal molar amounts of He, Ne, and Ar, their mole fractions are equal. After the addition of CO2 gas, its mole fraction is 0.25 (since all four gases are now present in equal amounts). Therefore, the partial pressure of CO2 is (0.25)(3.00 atm) = 0.75 atm, while the partial pressure of Ne is (0.25/1)(3.00 atm) = 0.75/3 = 0.25 atm. Therefore, the partial pressure of CO2 is three times that of Ne.For more such question on partial pressure
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500cm3 of copper chloride solution contains 6. 50g of copper chloride how much does 40cm3 contain
The amount of copper present in the given solution comes out to be 5.2 g of copper.
It is given that.
50 cm³ of copper chloride solution = 6.50 g copper
So, 1 cm³ pf copper chloride solution = 6.50 g / 50 cm³ of copper
So, in 40 cm³,
Using the conversion method. The factor-label method, also called dimensional analysis or unit conversions, is used to convert from one unit of measurement to another unit.
40 cm³ of copper chloride solution = (6.50 g / 50 cm³) x 40 cm³ of copper
= 5.2 g of copper.
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How do you name a compound that has multiple double/triple bonds?
To name a compound that has multiple double/triple bonds, you will need to follow these steps:
1. Identify the longest carbon chain containing the multiple bonds (double or triple).
2. Number the carbon atoms in the chain, starting from the end closest to the first multiple bond.
3. For each multiple bond (double/triple), indicate its position in the chain using the corresponding carbon number.
4. Use the prefixes "di-" or "tri-" for two or three multiple bonds of the same type, respectively. If there are different types of multiple bonds, use the prefixes "en" for double bonds and "yn" for triple bonds.
5. Combine the position numbers, prefixes, and the base name of the hydrocarbon (alkane, alkene, or alkyne).
For example, if you have a compound with two double bonds on the second and fourth carbons, the name would be 2,4-diene.
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What is the percent Sodium in Sodium Carbonate? Hint: You do NOT have to put the % sign in your answer. Hint: Na2CO3
Answer:
To find the percent of Sodium in Sodium Carbonate, follow these steps:
1. Determine the molecular formula of Sodium Carbonate: Na2CO3
2. Calculate the molar mass of Sodium Carbonate:
- Sodium (Na) has a molar mass of 22.99 g/mol.
- Carbon (C) has a molar mass of 12.01 g/mol.
- Oxygen (O) has a molar mass of 16.00 g/mol.
3. Calculate the total molar mass of Sodium Carbonate:
- (2 × 22.99 g/mol for Na) + (1 × 12.01 g/mol for C) + (3 × 16.00 g/mol for O) = 105.98 g/mol.
4. Calculate the mass contribution of Sodium:
- 2 × 22.99 g/mol = 45.98 g/mol.
5. Calculate the percent of Sodium in Sodium Carbonate:
- (Mass of Sodium / Total molar mass of Sodium Carbonate) × 100%
- (45.98 g/mol / 105.98 g/mol) × 100% ≈ 43.4%
The percent of Sodium in Sodium Carbonate is approximately 43.4%.
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what is an emulsion? how does using brine help with an emulsion?
An emulsion is a mixture of two immiscible liquids, typically oil and water, where one liquid is dispersed in the other in the form of small droplets. Brine, which is a solution of salt and water, can help with emulsions because salt is a natural emulsifying agent.
Emulsions can be created by vigorously shaking or blending the two liquids together, or by using an emulsifying agent such as egg yolks or mustard.
Brine, which is a solution of salt and water, can help with emulsions because salt is a natural emulsifying agent. When added to an emulsion, salt ions attach themselves to the surface of the droplets, which helps to stabilize the emulsion and prevent it from separating. Additionally, the salt in the brine can help to enhance the flavor and preserve the quality of the emulsion over time. Overall, using brine can be an effective way to improve the stability and quality of emulsions.
The use of brine, which is a high-concentration salt solution, helps with an emulsion by stabilizing the mixture and preventing the droplets from coalescing, maintaining the desired consistency of the emulsion. This is often achieved through the addition of an emulsifying agent or surfactant, which lowers the surface tension between the two liquids and promotes their dispersion.
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A cup of coffee has a hydroxide ion concentration of 1.0 × 10−10 m. what is the ph of this coffee?
The pH of the coffee is 4. To find the pH of the coffee, we first need to use the formula: pH = -log[H⁺], where [H+] is the concentration of hydrogen ions in the solution. However, the problem gives us the concentration of hydroxide ions ([OH⁻]), not hydrogen ions.
To get the concentration of hydrogen ions, we need to use the equation: Kw = [H⁺][OH⁻], where Kw is the ion product constant of water (1.0 x 10⁻¹⁴ at 25°C).
Rearranging this equation to solve for [H⁺], we get: [H⁺] = Kw/[OH⁻] = (1.0 x 10⁻¹⁴)/1.0 x 10⁻¹⁰ = 1.0 x 10⁻⁴ M.
Now we can use this value to find the pH of the coffee: pH = -log[H⁺] = -log(1.0 x 10⁻⁴) = 4.
Therefore, the pH of the coffee is 4.
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A given volume of methane diffuses in 20seconds. How long will it take the same volume of sulphur(4)oxide to diffuse under the same condition?
40 seconds long it take the same volume SO₂ to diffuse under the same condition.
Given that,
A volume of methane diffuses in 20 seconds.
We have to find how long will it take the same volume of SO₂ to diffuse under the same condition when CH₄ = 16 and SO₂ = 64
We know that,
What is Graham's law?Graham's law state that inversely proportional to the square root of its molecular mass is equal to the rate of effusion of a gas.
So,
By applying the Graham's law,
[tex]\frac{r_1}{r_2} =\sqrt{\frac{M_2}{M_1} }[/tex]
[tex]\frac{r(SO_2)}{r(CH_4)} =\sqrt{\frac{M(CH_4)}{M(SO_2)} } = \frac{t(CH_4)}{t(SO_2)}[/tex]
Where t(SO₂) = x, M(SO₂) = 64
t(Ch₄) = 20 sec, M(Ch₄) = 16
So,
[tex]\frac{t(SO_4)}{20} = \sqrt{\frac{64}{16} }[/tex]
t(SO₄) = 20 × [tex]\frac{8}{4}[/tex]
t(SO₄) = 40 seconds.
Therefore. 40 seconds long it take the same volume SO₂ to diffuse under the same condition.
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30g of a solid substance with a heat of fusion of 2. 65 J/g is melted on a hot plate. How much heat did it absorb during the phase change
So, 30 g of the solid substance absorbed 79.5 J of heat during the phase change.
The heat of fusion is the amount of heat energy required to melt one gram of a substance at its melting point. Therefore, to calculate the amount of heat absorbed during the phase change of 30 g of the solid substance with a heat of fusion of 2.65 J/g, we can use the following formula:
Q = m * ΔHf
here Q is the amount of heat absorbed (in joules), m is the mass of the substance (in grams), and ΔHf is the heat of fusion (in joules per gram).
Q = 30 g * 2.65 J/g
= 79.5 J
Therefore, 30 g of the solid substance absorbed 79.5 J of heat during the phase change.
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Name the 4 quantum numbers, their symbols, what they describe, their organizational level, and their possible values
The four quantum numbers, their symbols, descriptions, organizational levels, and possible values are as follows:
1. Principal quantum number (n): This quantum number describes the energy level and size of an electron's orbital. Its organizational level is the electron shell. Possible values are positive integers (n = 1, 2, 3, ...).
2. Angular momentum quantum number (l): This quantum number describes the shape of an electron's orbital. Its organizational level is the subshell. Possible values are integers ranging from 0 to (n - 1) (l = 0, 1, 2, ..., n - 1).
3. Magnetic quantum number (m_l): This quantum number describes the orientation of an electron's orbital in space. Its organizational level is the orbital. Possible values are integers ranging from -l to +l (m_l = -l, -(l-1), ..., 0, ..., +(l-1), +l).
4. Spin quantum number (m_s): This quantum number describes the intrinsic angular momentum (or "spin") of an electron. Its organizational level is the individual electron. Possible values are +1/2 and -1/2 (m_s = +1/2, -1/2).
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True or false. The value of Kw is 10^14 M^2 at 25°C.
The given statement, The value of Kw is 10¹⁴ M² at 25°C is False.
The value of Kw, otherwise known as the ionic product of water, is not 10¹⁴ M² at 25°C. Kw is the product of the activity of the hydrogen and hydroxide ions of a given solution at a certain temperature. The value of Kw depends on temperature and is an equilibrium constant for the dissociation of water into hydrogen and hydroxide ions.
At 25°C, the value of Kw is approximately 10⁻¹⁴ M², which is significantly lower than 10¹⁴ M². This is because water molecules are relatively stable at 25°C, so they do not easily dissociate into hydrogen and hydroxide ions. As temperature increases, so does the value of Kw, because the increased energy causes more water molecules to dissociate into ions, thus increasing the ionic product of water.
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Which has a greater degree of electrophilicity, a carbocation or a carbonyl carbon?
25) The rescue ship has to change their speed and trajectory. They figure they can deflect at a rate of 31 meters per second. How many kilometers will they deflect in 39 minutes? (Use dimensional analysis)
Answer:
72,540 meters
Explanation:
distance is equals to speed x time
first will change the time in minutes to sec ad Multiply
According to the data what kind of substance is bile?
*
0 points
it is a strong acid since the red litmus paper turns blue and the pH is 8. 2
it is a weak acid since the blue litmus paper turns red and the pH is 8. 2
it is a strong base since the red litmus paper turns blue and the pH is 8. 2
it is a weak base since the red litmus paper turns blue and the pH is 8. 2
Based on the given information, we can conclude that bile is a weak base since the red litmus paper turns blue and the pH is 8.2. Option D is the correct answer.
Bile is a greenish-yellow fluid produced by the liver that plays an important role in the digestion and absorption of fats. From the given information, we can conclude that bile is a weak base with a pH of 8.2.
This slightly basic pH helps to neutralize the acidic contents of the stomach as they enter the small intestine, creating a more favorable environment for the digestion and absorption of fats. Additionally, the presence of bile emulsifies fats, breaking them down into smaller droplets that can be more easily digested by lipases.
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Are the properties of the element and its compounds the same? Use
fluorine and fluorides to explain your answer.
3 marks
The properties of the element and its compounds are not the same. In the case of fluorine, we know that this is a volatile and reactive element but fluorides are stable and less harmful elements that can serve beneficial purposes.
Difference between fluorine and fluoridesFluorine is a chemical element that is known for its ability to combine easily with oxygen and other elements. It is a highly reactive substance but this is not the case with fluorides. The fluorides have already undergone a reaction so they are no longer as volatile as fluorine in the ordinary state.
They are used in toothpaste formulations to strengthen the gums but this cannot be said of fluorine which should not be tasted in the raw state.
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Consider the following reaction at K.
Which of the following statements are correct?
The described process is the six-electron reduction of Cr3+ ions to solid chromium (Cr) and solid selenium (Se). We can determine the accuracy of the following claims using the information provided:
G > 0: Under normal circumstances, the reaction is not spontaneous because it entails reducing Cr3+ ions to Cr, which requires energy input. G is hence positive.
S > 0: Without extra system knowledge, it is challenging to discern the sign of S. The total change in entropy (S) may, however, be little or even negative because the reaction results in the production of two solid products from two watery reactants.
Since G is positive, the reaction is reactant-favored and not product-favored. The claim that "The reaction is reactant-favored" is thus true.
Since the reaction involves the transfer of six electrons from Cr3+ to Se, the statement "n = 6 mol electrons" is accurate.
G > 0: Since the reaction is not spontaneous under normal circumstances, G is higher than zero.
The appropriate answers are thus:
The reaction is reactant-favored.
n = 6 mol electrons.
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most of the elements on the periodic table are produced by the expanding shockwave from a type ii supernova. this process is known as group of answer choices nuclear fusion nuclear fusion stellar nucleosynthesis exploding (supernova) nucleosynthesis
Most of the elements on the periodic table are produced by the expanding shockwave from a type ii supernova. this process is known as nucleosynthesis.
In the centres of most stars, lighter elements like hydrogen and helium are fused to form the most prevalent elements, such as carbon and nitrogen. However, only large stars that die in supernova explosions may produce the strongest elements, including iron.
Large nuclear reactors make up stars. Massive atomic collisions that tear apart atoms in the centre of stars change their atomic structure and unleash a great amount of energy. The result is hot and brilliant stars. Stars are powered by nuclear fusion, an atomic reaction. Because they are so strong, supernovae produce brand-new atomic nuclei. When a big star collapses, a shockwave is created that may trigger fusion reactions in the star's outer shell. Nucleosynthesis, a process that results from these fusion processes, produces fresh atomic nuclei.
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which answer choice determines whether or not an action potential is triggered in the postsynaptic neuron?
A. the magnitude of the depolarizing excitatory postsynaptic potentials (EPSPs)
B. the magnitude of the hyperpolarizing inhibitory postsynaptic potential (IPSP)
C. the overall net change in membrane potential caused by the combined EPSPs and IPSPs
The answer choice that determines whether or not an action potential is triggered in the postsynaptic neuron is C. the overall net change in membrane potential caused by the combined EPSPs and IPSPs.
This is because the postsynaptic neuron integrates both the depolarizing effects of excitatory postsynaptic potentials (EPSPs) and the hyperpolarizing effects of inhibitory postsynaptic potentials (IPSPs) to determine if the action potential threshold is reached. If the net effect of these combined potentials surpasses the threshold, an action potential will be generated in the postsynaptic neuron.
Conversely, if the combined potentials do not meet the threshold, an action potential will not be triggered. Therefore, it is the overall net change in membrane potential caused by the simultaneous presence of both EPSPs and IPSPs that ultimately decides whether an action potential will be initiated in the postsynaptic neuron. The answer choice that determines whether or not an action potential is triggered in the postsynaptic neuron is C. the overall net change in membrane potential caused by the combined EPSPs and IPSPs.
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The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0°C is 4.9 × 10^-10. What is the pH of an aqueous solution of 0.040 M sodium cyanide (NaCN)?
A) 10.96
B) 3.04
C) 9.0 × 10^-4
D) 1.1 × 10^-11
E) 2.0 × 10^-11
To find the pH of an aqueous solution of 0.040 M sodium cyanide (NaCN) given the acid-dissociation constant (Ka) of hydrocyanic acid (HCN) at 25.0°C is 4.9 × 10^-10, follow these steps:
1. Write the dissociation reactions for NaCN and HCN:
NaCN → Na+ + CN-
HCN + H2O ⇌ H3O+ + CN-
2. Since NaCN dissociates completely, the initial concentration of CN- will be 0.040 M.
3. Use the Ka expression for HCN:
Ka = [H3O+][CN-] / [HCN]
4. Substitute the known values and let x be the concentration of H3O+:
(4.9 × 10^-10) = x(0.040) / x
5. Solve for x (the concentration of H3O+):
x = √(4.9 × 10^-10 × 0.040) = 1.4 × 10^-5 M
6. Calculate the pH using the formula pH = -log[H3O+]:
pH = -log(1.4 × 10^-5) ≈ 10.96
The pH of the aqueous solution of 0.040 M sodium cyanide (NaCN) is approximately 10.96. The correct answer is A) 10.96.
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To determine the R/S configuration of a chiral center in a Fisher projection, we need to be sure that the lowest priority group is on a vertical line. If it isn't given to us like this, how do we change it so it is?
You can determine the R/S configuration of a chiral center in a Fischer projection when the lowest priority group is not initially on a vertical line.
What is R/S configuration?To determine the R/S configuration of a chiral center in a Fischer projection when the lowest priority group is not on a vertical line, you can follow these steps:
1. Identify the chiral center and assign priority to the four groups attached to it based on the Cahn-Ingold-Prelog rules (the higher the atomic number, the higher the priority).
2. Rotate the Fischer projection in such a way that the lowest priority group (group 4) is placed on a vertical line. You can achieve this by mentally exchanging two groups at a time until the desired orientation is obtained. Remember, every exchange reverses the configuration (from R to S or vice versa).
3. Once the lowest priority group is on a vertical line, determine the R/S configuration by observing the clockwise or counterclockwise direction of the priority order (1-2-3). If the order is clockwise, it is R; if counterclockwise, it is S.
4. If you made an odd number of exchanges in step 2, the configuration remains the same. If you made an even number of exchanges, the configuration is reversed (R to S or vice versa).
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when does crosion take place ?
General corrosion occurs when most or all of the atoms on the same metal surface are oxidized, damaging the entire surface. Most metals are easily oxidized: they tend to lose electrons to oxygen (and other substances) in the air or in water. As oxygen is reduced (gains electrons), it forms an oxide with the metal
7C - Muscles and Bones
1.What gases does your body need and why?
2.How and why your Breathing rate/Pulse rate changes. (Difference between active and
resting)
3..what is a drug
4..What is the structure of the human arm and what muscles help it to move.
5. What is the Structure of capillaries and how 02/CO2 are stored and carried.
7F - Acids and Alkalis
1.What is an acid?
2.What is an Alkali?
3.What is a Neutral substance?
4.How does litmus reacts to Acids and Alkalis.
5.What is a variable?
6.What is the name of the reaction between an acid and an alkali?
7.What are the common Word equations (eg: sulfuric acid + zinc oxide—> zinc nitrate + water)
8.What are products and what are reactants？
The information about muscles and bones and acid and alkalis are given below.
What gases does your body need and why?Your body needs oxygen (O2) and carbon dioxide (CO2) gases for different processes. Oxygen is necessary for cellular respiration, which is the process by which your body creates energy from glucose. Carbon dioxide, on the other hand, is a waste product of cellular respiration and must be removed from the body. It is transported to the lungs and exhaled.
How and why does your Breathing rate/Pulse rate changes. (Difference between active and resting)Breathing rate and pulse rate are controlled by the autonomic nervous system, which responds to changes in the body's need for oxygen and removal of carbon dioxide. During physical activity or exercise, the body's need for oxygen increases, and so the breathing rate and pulse rate increase to deliver more oxygen to the muscles. When at rest, the body requires less oxygen, so the breathing rate and pulse rate decrease.
What is a drug?A drug is a substance that affects the way the body functions. Drugs can be used for medicinal purposes, such as to treat diseases or alleviate symptoms, or for recreational purposes. Some drugs are legal and can be obtained with a prescription, while others are illegal.
What is the structure of the human arm and what muscles help it to move?The human arm consists of three main parts: the upper arm, the forearm, and the hand. The upper arm bone is called the humerus, and the two bones in the forearm are called the radius and ulna. The hand consists of the wrist, palm, fingers, and thumb. Muscles that help to move the arm include the biceps brachii, triceps brachii, deltoid, and rotator cuff muscles.
What is the structure of capillaries and how O2/CO2 are stored and carried?Capillaries are small, thin-walled blood vessels that connect arteries and veins. They have a single layer of cells that allows for the exchange of gases, nutrients, and waste products between the blood and the tissues. Oxygen (O2) and carbon dioxide (CO2) are stored and carried by hemoglobin, a protein found in red blood cells. In the lungs, hemoglobin binds to oxygen, and in the tissues, it releases oxygen and binds to carbon dioxide for transport back to the lungs.
What is an acid?An acid is a chemical substance that donates protons (hydrogen ions) to a solution. Acids have a pH less than 7 and can be corrosive or sour. Some common examples of acids include hydrochloric acid, sulfuric acid, and citric acid.
What is an Alkali?An alkali is a chemical substance that accepts protons (hydrogen ions) from a solution. Alkalis have a pH greater than 7 and can be caustic or bitter. Some common examples of alkalis include sodium hydroxide and potassium hydroxide.
What is a Neutral substance?A neutral substance is a chemical substance that has a pH of 7, which is neither acidic nor alkaline. Water is a good example of a neutral substance.
How does litmus react to Acids and Alkalis?Litmus is a type of dye that changes color in response to pH changes. It turns red in acidic solutions (pH less than 7) and blue in alkaline solutions (pH greater than 7).
What is a variable?A variable is a factor or condition that can be changed or manipulated in an experiment or study. It can be either an independent variable (the variable that is being manipulated) or a dependent variable (the variable that is being measured).
What is the name of the reaction between an acid and an alkali?The name of the reaction between an acid and an alkali is a neutralization reaction.
What are the common Word equationsSome common word equations involving acids and alkalis include:
Hydrochloric acid + sodium hydroxide → sodium chloride + water
Sulfuric acid + potassium hydroxide → potassium sulfate + water
Nitric acid + calcium hydroxide → calcium nitrate + water
What are products and what are reactants？In a chemical reaction, reactants are the starting materials or substances that undergo a chemical change, while products are the substances that are formed as a result of the chemical change. For example, in the reaction between hydrochloric acid and sodium hydroxide, the reactants are hydrochloric acid and sodium hydroxide, and the products are sodium chloride and water. The chemical equation for this reaction is:
HCl + NaOH → NaCl + H2O
Here, HCl and NaOH are the reactants, while NaCl and H2O are the products.
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How do I answer question A?
(a) The number of moles of the gas is 0.00032 mol.
The ideal gas law is expressed as :
P V = n R T
Where,
The pressure of the gas is P = 7.74 × 10³ pa = 0.075 atm
The volume of the gas is V = 10.7 mL = 0.0107 L
The number of moles = ?
The temperature in K = 25 + 273 = 298 K
The gas constant is R = 0.0823 atm L / mol K
The number of moles is expressed as :
The number of moles of gas, n = P V / R T
The number of moles of gas, n = ( 0.075 × 0.0107 ) / ( 0.0823 × 298 )
The number of moles of gas, n = 0.00032 mol
The number of moles of gas is 0.00032 mol with the pressure of 0.075 atm.
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five different substances are given to you to be dissolved in water. which substances are most likely to form a solution when placed in water?
The substances are most likely to the form the solution when it is placed in the water is Sodium Iodide, the Propanol, Potassium Fluoride.
The solubility of the solute in the solvent will be depends on the solute-solvent interaction. The interaction in between the solute and the solvent will be increases, the solubility will increases.
The Propanol will be dissolve in the water as the is the polar covalent. The Pentane and the benzene are the nonpolar hydrocarbons, and it will not dissolve as in the polar solvent, water. The Sodium Iodide, the Propanol, and the Potassium Fluoride are correct options.
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This question is incomplete, the complete question is :
five different substances are given to you to be dissolved in water. which substances are most likely to form a solution when placed in water?
Sodium Iodide, Propanol, Potassium Fluoride, pentene, benzene.
what is a formula unit? formula weight?
what is the unit used for molecular weight and formula weight? what is the difference between these two weights? how are these found
A formula unit is the smallest repeating unit of a compound in ionic form, and it represents one molecule or ion. The formula weight, on the other hand, is the sum of the atomic weights of all the atoms in a compound's formula, including both the empirical formula and the molecular formula.
The unit used for molecular weight and formula weight is atomic mass units (amu) or grams per mole (g/mol). The difference between these two weights is that the molecular weight is the weight of a molecule in its simplest form, while the formula weight is the weight of the empirical formula of a compound.
To find the molecular weight of a compound, you add up the atomic weights of all the atoms in the molecule. To find the formula weight, you add up the atomic weights of all the atoms in the empirical formula. For example, the molecular weight of water is
18.015 g/mol (2 x 1.008 amu for hydrogen + 1 x 15.999 amu for oxygen),
while the formula weight is 18.015 g/mol as well (1 x 1.008 amu for hydrogen + 1 x 15.999 amu for oxygen).
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1 2.73 g sample of water is injected into a closed evacuated flask at 65 c. what percent (by mass) of the water will be vapor when equilibrium is reached? the vapor pressure of water is
When 12.73 g sample of water is injected into a closed evacuated flask of volume 5L at 65 c. By 6.377% percent of the water will be vapor when equilibrium is reached.
The ideal gas law can be demonstrated as the equation of the state of a perfect gas. The product of the pressure and volume of a one-mole ideal gas is equal to the product of the absolute temperature (T) and universal gas constant (R).
Mathematically the ideal gas equation can be described as follows:
PV = nRT
Where n is the moles of a substance, R is the gas constant., T is the temperature, P is the pressure, and V is the volume of the gas.
Given, the volume of water, V = 5 L
The temperature of the water, T = 65°C = 65 + 273 = 338 K
The pressure of the water, P = 187.5 mmHg = 0.25 atm
Substituting the values V, R, P, and temperature in the ideal gas equation, we get:
The number of moles of water vapor, n = PV/RT
n = 0.25 ×5/(0.082 × 338)
n = 0.0451 mol
The mass of the water vapor = 0.0451 × 18 = 0.812 g
The percent of water vaporized = (0.812/12.73) × 100 = 6.377%
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The complete question is
1 2.73 g sample of water is injected into a closed evacuated flask of volume 5L at 65 c. what percent (by mass) of the water will be vapor when equilibrium is reached? the vapor pressure of water at 65°C is 187.5 mmHg
SN2 reactions are result in a product that has the same relative configuration. True or false?
True. SN2 reactions typically result in a product that has the same relative configuration as the starting material.
The SN2 reactions same relative configuration is because the nucleophile attacks the carbon from the opposite side of the leaving group, leading to inversion of the stereochemistry.
A nucleophilic substitute in which the rate demanding step involve 2 components.
for example; oH cL
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