The volume occupied by 22. 0 g of helium gas at 26. 0 ° C and 1. 20 atm of pressure is 112.37 L .
Calculation ,
According to ideal gas equation ,
PV = nRT ....(i)
where P is the pressure = 1. 20 atm
V is the volume of the helium gas = ?
R is the universal gas constant = 0.082 atm L /K mol
T is the temperature of the gas = 26. 0 ° C = 299 K
n is the number of moles
Number of miles (n) = given mass/ molar mass =22 g/4 = 5.5 moles
By putting the value of pressure , volume , temperature and universal gas constant in equation ( i) we get
1. 20 atm ×V = 5.5 moles × 0.082×299
V = 5.5 moles × 0.082×299/1. 20 atm = 112.37 L
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The atomic models after dalton’s time included ideas about the atomic structure. which atomic model that shows the atomic structure is missing from this set? bohr’s model schrödinger’s model rutherford’s model thomson’s model
Which atomic model that shows the atomic structure is missing from this set?
Dalton’s model
In 1898, J. J. Thomson proposed the first of many atomic models to come as he made the proposition that the shape of an atom was like a sphere.
What is an Atomic Structure?This refers to the way and manner an atom is arranged and the things that are contained in it.
Hence, we can see that an atom contains:
ProtonsNeutronsNucleusTherefore, the atomic model that shows the atomic structure is missing from this set is Dalton's model.
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The complete question is:
The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one important model is missing.
An image at left with overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. An image at center left with a purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals. An image at center right with a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle.
Which atomic model is missing from this set?
Bohr’s model
Dalton’s model
Rutherford’s model
Thomson’s model
Answer: B. schrodingers model
Explanation:
correct on edge
What is the standard potential, e∘celle∘cell, for this galvanic cell? use the given standard reduction potentials in your calculation as appropriate
0.56 V is the standard potential, e∘cell∘, for this galvanic cell.
The standard reduction potential can be calculated by subtracting the standard reduction potential for the reaction occurring at the cathode from the standard reduction potential for the reaction occurring at the anode. The minus sign is necessary because oxidation is the polar opposite of reduction. The total cell potential can be calculated using the formula E0cell=E0red+E0oxid. Step two is to find a solution. Before the two reactions may be integrated, the number of electrons gained in the reduction must match the number of electrons lost in the oxidation
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#4204.
The standard potential for the given galvanic cell is 0.477 V
What is electrode potential?The electrode potential is the electromotive force of a galvanic cell built using a standard reference electrode and another electrode whose potential is to be found.
There are two types of electrode potential
Oxidation potential - The potential associated with oxidation reaction is known as oxidation potential
Reduction potential - The potential associated with reduction reaction is known as reduction potential
At the anode, oxidation occurs
[tex]Sn(s)\rightarrow Sn^{2+}(aq)+2e^-[/tex]
At the cathode, reduction occurs
[tex]Cu^{2+}(aq)+2e^-\rightarrow Cu(s)[/tex]
[tex]E^o_{cell} =E^o_{cathode} -E^o_{anode}[/tex]
= 0.337 - (-0.140)
= 0.477 V
Thus, The standard potential for the given galvanic cell is 0.477 V
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Disclaimer: The question was given incomplete on the portal. Here is the complete question
Question: What is the standard potential, E∘cell, for this galvanic cell? Use the given standard reduction potentials in your calculation as appropriate.
[tex]Sn^{2+}(aq)+2e^-\rightarrow Sn(s)[/tex], E°red=−0.140 V
[tex]Cu^{2+}(aq)+2e^-\rightarrow Cu(s)[/tex], E°red=+0.337 V
A gas at constant volume has a pressure of 4. 50 atm at 200k. What will be the pressure of the gas at 250k?
There will be 5.625 atm pressure of the gas at 250 K when a gas at constant volume has a pressure of 4. 50 atm at 200 K
According to gas law at constant volume the pressure of a given gas is directly proportional to the kelvin temperature .
[tex]P_{1} =T_{1}[/tex] (i)
[tex]P_{2} = T_{2}[/tex] (ii)
Where P and T is the pressure and temperature
Divide equation ( i ) by equation ( ii ) we get
[tex]P_{1}/P_{2}[/tex] = [tex]T_{1}/T_{2}[/tex]
Now putting the value of all given data in above final equation then we get.
4. 50 atm/[tex]P_{2}[/tex] = 200K/250K
[tex]P_{2}[/tex] = 4. 50 atm × 250K/ 200K = 5.625 atm
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What is the multiplicity of the indicated carbon in an off-resonance decoupled c-13 nmr spectrum?
Tert-butyl alcohol's 13C-NMR spectrum will only display two signals.
(I) Signal at about 31 ppm: This signal is for the more shielded and electron-rich carbon atoms and is upfield. The height of the peak on the y-axis indicates the relative quantity of carbon atoms to other peaks. Since it is three times as tall as the second signal in this instance, it is clear that this peak represents three carbon atoms.
(ii) Signal at about 70 ppm: This signal is directed downfield and pertains to the carbon atom, which is more exposed and has an environment poor in electrons. The height of these peaks is only one carbon higher than the second signal. Furthermore, the exposed environment demonstrates this carbon.
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Risk premiums on corporate bonds tend to ________ during business cycle expansions and ________ during recessions, everything else held constant.
Risk premiums on corporate bonds tend to decreases during business cycle expansions and increases during recessions, everything else held constant.
A bond that is sold for more than it is worth. when the prevailing interest rate is lower than the coupon rate.
Corporate bond risk premiums have become typically anticyclical, meaning they rise during recessions as well as fall throughout expansions of the business cycle.
Bonds that trade above their face value or cost more than their face value are referred to as premium bonds. Since its interest rate has been higher than those of the current market, a bond may trade at a premium. The bond's price may also increase as a result of the company's as well as the bond's credit ratings.
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Please help,
How could you tell a Ca(NO3)2 solution from a Zn(NO3)2 solution?
Answer:
Anhydrous calcium nitrate reaction with water is highly endothermic
Which process in the nitrogen cycle converts nitrogen into its most polluting form?
The process in the nitrogen cycle converts nitrogen into its most polluting form will be "nitrification".
The biological process of nitrification turns ammonia into nitrite and nitrite into nitrate. The technique of denitrification, which turns nitrate into nitrogen gas, is such treatment option if requirements demand that the resultant nitrate be eliminated.
A surplus of nitrogen compounds could result in pollutants like ammonia and ozone that can affect plant growth, visibility, and human capacity to breathe. Excess nitrogen from the atmosphere that returns to earth could be damaging to the health of forests, soils, including streams.
Therefore, the process in the nitrogen cycle converts nitrogen into its most polluting form will be "nitrification".
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A d1 octahedral complex is found to absorb visible light, with the absorption maximum occurring at 503 nm. calculate the crystal-field splitting energy, δ , in kj/mol
237.9 KJ/mol⁻¹ crystal-field splitting energy is found to absorb visible light.
What is crystal-field splitting energy?The energy of the electron configuration in the ligand field less the energy of the electronic configuration in the isotropic field is known as the crystal field energy.
The core metal ion's d orbitals split into two groups with various energies in an octahedral complex. The energy of the electron transition, which is related to the wavelength of the emitted light, is equal to the energy of the crystal-field splitting.
Δ = E = ℎ c / λ
Where,
where ℎ is the Planck constant, 6.62*10⁻³⁴m²kg s⁻¹, and c is the speed of light, 3 x 10⁸m s⁻¹.
Δ = 6.62*10⁻³⁴m²kg s⁻¹ / 503 x 10⁻⁹
= 3.95 x 10⁻¹⁹
= 3.95 x 10⁻¹⁹
This value is the splitting energy per ion.
To convert it to J/mol, we should multiply it by Avogadro number, 6.022 x 10²³mol⁻¹
= 3.95 x 10⁻¹⁹ x 6.022 x 10²³mol⁻¹
= 237.9 KJ/mol⁻¹
Therefore, the crystal-field splitting energy is 237.9 KJ/mol⁻¹ .
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pls help
complete the table below by writing the symbols for the cation and anion that make each ionic compound
Answer:
CrO₂ --------------------> Cr⁴⁺ and O²⁻
VCO₃ -------------------> V²⁺ and CO₃²⁻
Cr₂(SO₄)₃ -------------> Cr³⁺ and SO₄²⁻
(NH₄)₂S ----------------> NH₄⁺ and S²⁻
Explanation:
Within ionic compounds, the cation is listed first, followed by the anion. Some of the ions are polyatomic, meaning they are covalently bonded to other elements. Polyatomic ions always have a specific charge.
All of these ionic compounds have an overall charge of 0. As such, the charges of the cations and anions must balance out. In order to do so, there are some compounds which have more than one atom of each ion.
2.) CrO₂
------> Oxygen (O) always forms the anion, O²⁻.
------> Therefore, if there are 2 oxygen anions, the chromium (Cr) must have the cationic form of Cr⁴⁺.
------> +4 + (-2) + (-2) = 0
3.) VCO₃
------> Carbonate (CO₃), a polyatomic ion, always has the state CO₃²⁻.
------> If there is only one atom of each ion, the charges must perfectly balance, making vanadium (V) be the cation V²⁺.
------> +2 + (-2) = 0
4.) Cr₂(SO₄)₃
------> Sulfate (SO₄), a polyatomic ion, always has the state SO₄²⁻.
-------> The only way the charges could balance out is if the chromium (Cr) is in the cationic form Cr³⁺.
------> +3 + 3 + (-2) + (-2) + (-2) = 0
5.) (NH₄)₂S
------> Ammonium (NH₄), a polyatomic ion, always has the state NH₄⁺.
------> Sulfur (S) always forms the anion S²⁻.
------> +1 + 1 + (-2) = 0
A water molecule is considered a compound because
All of the atoms in the compound have the same number of protons.
You can separate the Oxygen from the Hydrogen via chemical means.
You can separate the hydrogen atoms from the Oxygen via physical means.
You cannot separate Oxygen and Hydrogen atoms.
Please help
[tex]{ \green{ \tt{option}}} \: (b)[/tex]
[tex]{ \orange{ \bold{A \: water \: is \: considered \: as \: compound \: because}}}[/tex]
[tex]{ \red{ \tt{you \: can \: separate \: the \: oxygen \: from \: the \: hydrogen \: via \: chemical \: means}}}[/tex]
Olive oil and butter both contain fats; however, olive oil is liquid at room temperature and butter is solid. Why?.
Double bonds found in unsaturated fats form structures that stop tightly bound formations.
The arrangement of the phospholipids in the bilayer cell membrane depends on features of the phospholipid head and tails.
What are saturated and unsaturated fatty acids ?Unsaturated fatty acids have at least one double bond in the fatty acid chain while saturated fatty acids have no double bonds between the individual carbon atoms. Unsaturated fats are typically liquid and come from plant sources, whereas saturated fats are typically solid at room temperature
Animal fats, palm oil, and other sources of saturated fats are available. Plant and vegetable oils are sources of unsaturated fatty acids,Consuming healthy fats instead of saturated fat can also aid in preventing insulin resistance, a condition that precedes diabetes. Since unsaturated fat continues to be the healthiest type of fat, saturated fat may not be as bad as previously believedLearn more about Fatty acids here:
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How much has co2 increased in the atmosphere since 1750? group of answer choices
Since 1750, about 46 percent of CO2 is increased in the atmosphere.
Co2 gas is considered as Greenhouse effect.
Green house effect : The trapping of the sun's warmth in a lower atmosphere of planet, due to the more and more transparency of the atmosphere to visible radiation from the sun than the infrared radiation which are emitted by the surface of the planet.
Due to greenhouse effect the temperature of earth surface increases.
Many reasons for increase in Greenhouse effect are as follow:
DeforestationBurning of fossil fuels.FarmingIndustrial waste and landfills. Global warmingdepletion of ozone layerAir pollutionDue to these reason the percentage of CO2 in the atmosphere is increased by 46.
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What are the two most common unwanted side reactions which can occur when monosaccharides are treated with base?
Epimerization and Enediol rearrangement are the two most common unwanted side reactions which can occur when monosaccharides are treated with base.
Epimerization is a process in stereochemistry in which there is a change in the configuration of only one chiral centre. As a result, a diastereomer is formed. The classical example of this in medicine is tetracycline. In acidic conditions around pH 4, tetracycline readily undergoes epimerization at position 4, and an inactive 4-epitetracycline is produced, which on dehydration forms 4-epianhydrotetracycyline, a highly toxic product. This toxic compound can also be formed from acid catalysed (at lower pH) dehydration of tetracycline via anhydrotetracycline.
Enediol rearrangement is a transformation which occurs at basic medium and allows the conversion of epimers, defined as isomeric forms that differ in the position of the hydroxyl group at C-2. In this way it is possible to transform through the enediol intermediate glucose to mannose and vice versa.
Another important isomerization process through the enediol rearrangement is the interconversion of glucose and fructose. Thus, the enolization proceeds by migration of proton at position 2, to carbon at 1.
Monosaccharides contain both alcohol and carbonyl functional groups. This allows monosaccharides to undergo many of the reactions typical for these functional groups. In particular, alcohols can be converted to esters, converted to ethers, converted to acetals, or oxidized. Carbonyls can be reacted with nucleophiles, be reduced to form alcohols, or be oxidized to form carboxylic acids.
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What are crime scenes that you can do with a friend for fun. Friend in crime
1. I think r0b a bank would be such a rush. Imagine r0b a bank, driving a souped up getaway vehicle, and then successfully escaping with loads of cash...., that would be such an adrenaline rush.
2. Nationwide animal release. Just ninja into pounds and shelters and set them all free. It'd get to the point that they'd have to get armed guards. Soon wild packs of pugs and Chihuahuas roam freely claiming their territory against man.
3. Putting glitter bombs in mailboxes. Not sending but personally taping it in there so it goes off when opened.
Calculate the number of atps generated by completely oxidizing one molecule of tripalmitoylglycerol into co2 and h2o ?
The number of atps generated is 330 ATP
What is atps?
At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate.
Glycerol provided us with 2 ATP and 2 NADH. In b-oxidation, we obtained 8 NADH and 8 FADH from each fatty acid, but since there were 3 fatty acids, we also produced 24 NADH and 24 FADH. We used 24 acetyl-CoA molecules, which were converted into 24 ATP, 24 FADH, and 72 NADH molecules by the citric acid cycle. You should obtain the same figures after adding everything up.
80 NADH x 3 ATP/NADH = 240 ATP
32 FADH x 2 ATP/FADH = 64 ATP
102 + 64 + 26 ATP = 330 ATP.
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Which type of nuclear decay is the radioactive isotope fe2659 likely to undergo?
Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.
Whenever there are too many protons or even neutrons in a nucleus, one of the protons and neutrons will turn into the other, which is known as beta decay. During beta minus decay, a neutron transforms into a proton, electron, as well as antineutrino.
[tex]Fe_{26} ^{59}[/tex] → [tex]Co_{27} ^{59} +\beta_{1} ^{0}[/tex]
It can be seen that after the beta minus decay Fe changes into Co.
In beta decay , decrease in atomic number by one unit Fe atom get converted into Co atom.
Neutron-rich nuclei often decay by producing both an electron and an antineutrino.
Therefore, Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.
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calculate the pressure exerted by an book of mass 20kg occupying an area of 2 m square.
The answer is 100 Pa.
The formula for calculating pressure is :
Pressure = Force ÷ Area
We are given that :
mass = 20 kgarea = 2 m²We also know that :
Force = mass ×g
So, force will be :
F = 20 × 10 F = 200 NNow, we can finally calculate pressure :
P = 200 ÷ 2P = 100 PaDescribe how water contributes to the fitness of the environment to support life.
Water contributes to the fitness of the environment to support life by acting as a Solvent for molecules to interact Moderate Earth's climate.
Water contributes to the fitness of the environment to support life in several ways :
Life on Earth began in water and evolved there for 3 billion years before colonizing the land.Even terrestrial organisms are tied to water.Most cells are surrounded by water.Cells are about 70–95% water.Water is a reactant in many of the chemical reactions of life.Water is the only common substance that exists in the natural world in all three physical states of matter: solid ice, liquid water, and water vapour.Water stabilizes air temperatures by absorbing heat from warmer air and releasing heat to cooler air.Water can absorb or release relatively large amounts of heat with only a slight change in its own temperature.Water’s high heat of vaporization moderates climate.Much of the sun’s heat absorbed by tropical oceans is used for evaporation of surface water.Water is unusual because it is less dense as a solid than as a cold liquid.Most materials contract as they solidify, but water expands.At temperatures above 4°C, water behaves like other liquids, expanding as it warms and contracting as it cools.Water begins to freeze when its molecules are no longer moving vigorously enough to break their hydrogen bonds.When water reaches 0°C, water becomes locked into a crystalline lattice, with each water molecule bonded to a maximum of four partners.Learn more about Water here : https://brainly.com/question/5060579
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This liquid carries red blood cells and white blood cells around the body. It also transports several different substances in solution, including -------- and------- .
Answer:
Water and Salts
Explanation:
Hope it helps u....
What is one of the most common uses of polyvinyl chloride? select one: a. 2-l soda bottles b. styrofoam cups c. plastic pipes d. plastic food bags e. plastic garbage cans
The correct answer choice which is the most common use of polyvinyl chloride is: plastic pipes. Option C
Below are some other uses of polyvinyl chloride:
It's pipes is used for fittingsIt's pipes is used for building infrastructure and structural materialIt is used for coatingsWhat is polyvinyl chloride?Polyvinyl Chloride (PVC) is polymer which is used in various applications including widespread use in building, transport, packaging, electrical and healthcare applications.
So therefore, the most common use of polyvinyl chloride is in the making of plastic pipes
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15 POINTS!! does anyone know the answer to this? is it A?
GIVING BRAINLIEST TO THE BEST EXPLANATION!!
Answer:
b.2
Explanation:
Answer:
Mole fraction of water(H₂O) is 0.5 and the mole fraction of CH₃OH(Methanol) is 0.5.
Explanation:
Greetings !
The molecular weight of CH₃OH(Methanol)=32g/mol
The number of moles of CH₃OH=
[tex] \frac{128g}{32g/mol} [/tex]
=4moles
The molecular weight of water H₂O =18g/mol
The number of moles of=
[tex] \frac{72g}{18g/mol} [/tex]
=4moles
Total number of moles in the solution =4mol + 4mol
=8mol
Mole fraction Methanol CH₃OH=
[tex] \frac{4mol}{8mol} [/tex]
=0.5mol
Hope it helps!
How would you distinguish benzoic acid and benzyl alcohol by their infrared spectra?
The OH peaks in the IR spectra of benzyl alcohol and benzoic acid should be compared and contrasted.
What is the IR spectra of Benzoic acid?The right-hand portion of the infrared spectrum of benzoic acid, between wavenumbers 1500 and 400 cm-1, is referred to as the fingerprint region. It results from a special combination of intricately overlapping vibrations of the atoms within the benzoic acid molecule.What is the IR spectra of Benzyl alcohol?A C-Cl bond is frequently shown by a peak at 700.There are a few more peaks at 1500 that are directed at a C=C bond.What is IR spectra?The percent transmittance (or absorbance) of the radiation through the molecule against the radiation's wave number forms the IR spectrum.
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It is important to contrast and compare the OH peaks in the IR spectra of benzyl alcohol and benzoic acid.
What does benzoic acid's IR spectrum look like?The fingerprint region is the region between wavenumbers 1500 and 400 cm-1 on the right side of the infrared spectrum of benzoic acid.The benzoic acid molecule's atoms vibrate in a unique pattern that involves intricately overlapping vibrations, which causes it.What does benzyl alcohol's IR spectrum look like?A peak at 700 is typically used to indicate a C-Cl bond.At 1500, there are a couple more peaks that are focused on a C=C bond.How do IR spectra work?The IR spectrum is made up of the radiation's wave number divided by its percent transmittance (or absorbance) through molecules.To learn more about IR spectrum visit:
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The average atomic mass of lithium is 6.94 amu. Based on the atomic masses of the two isotopes of lithium, how do the relative abundances of the isotopes compare?
Answer:
Answer:
a) The relative abundance of Li-6 =0.0749 = 7.49%
The relative abundance of Li-7 =1 - 0.0749 = 0.9251 =92.51%
b) The fraction of sample of lithium atoms with exact mass of 6.941 amu is 0.
The relative abundance of ⁶Li is around 0.076, and the relative abundance of ⁷Li is approximately 0.924.
To determine the relative abundances of isotopes, we need to compare the atomic masses of the isotopes and their average atomic mass.
Lithium has two stable isotopes: lithium-6 (⁶Li) and lithium-7 (⁷Li). The atomic masses of these isotopes are approximately 6.015 amu and 7.016 amu, respectively.
The average atomic mass of lithium, given as 6.94 amu, is a weighted average of the masses of the two isotopes, taking into account their relative abundances.
Let's assume the relative abundance of ⁶Li is x (in decimal form) and the relative abundance of ⁷Li is (1 - x). The average atomic mass equation can be set up as:
(6.015 amu * x) + (7.016 amu * (1 - x)) = 6.94 amu
Simplifying the equation:
6.015x + 7.016 - 7.016x = 6.94
Combining like terms:
-0.001x = -0.076
Dividing both sides by -0.001:
x ≈ 0.076
Therefore, the relative abundance of lithium-6 (⁶Li) is approximately 0.076, and the relative abundance of lithium-7 (⁷Li) is approximately (1 - 0.076) = 0.924.
In summary, the relative abundance of ⁶Li is around 0.076, and the relative abundance of ⁷Li is approximately 0.924.
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2CO(g) + O2(g) = 2CO2(g)
If 6.0 L of CO reacts at STP, how many liters of oxygen are required for the reaction?
Answer:
3.0 L O₂
Explanation:
If CO reacts at STP, it means that there are 1.0 moles of CO. To find the moles of O₂, you need to use the mole-to-mole ratio from the given equation.
1.0 moles CO 1 mole O₂
---------------------- x --------------------- = 0.5 moles O₂
2 moles CO
To calculate the liters of oxygen, you need to use Avogadro's Law:
V₁ / N₁ = V₂ / N₂
In this equation, "V₁" and "N₁" represent the volume and moles of the first molecule. "V₂" and "N₂" represent the volume and moles of the second molecule. You can plug the given and calculated values into the equation and simplify to isolate V₂.
V₁ = 6.0 L V₂ = ? L
N₁ = 1.0 moles N₂ = 0.5 moles
V₁ / N₁ = V₂ / N₂ <----- Avogadro's Law
(6.0 L) / (1.0 moles) = V₂ / (0.5 moles) <----- Insert values
6.0 = V₂ / (0.5 moles) <----- Simplify left side
3.0 = V₂ <----- Multiply both sides by 0.5
**I am not 100% confident on this answer. Please let me know if it is incorrect**
Answer:
2CO(g) + O2(g) → 2CO2(g)
If 9.0 L of O2 react at STP, how
many moles of CO2 form during the
reaction?
[?] mol CO2
Explanation:
What would it be if it was 9.0?
What does the kinetic theory state about the relationship between the speed and temperature of gas molecules?
As the temperature increases, the speed of gas molecules increases
The kinetic theory state about the relationship between the speed and temperature of gas molecules as with an increase in temperature, the speed of gas molecules increases.
The energy that an object possesses as a result of its motion is known as kinetic energy.
The average of the kinetic energies of all the particles in a system is known as the average kinetic energy.
The following equation provides the answer:
K = [tex]\frac{3RT}{2}[/tex]
K= kinetic energy
R= gas constant
T= temperature
It is clear from above that kinetic energy and system temperature are inversely correlated. Therefore, if the temperature is higher, the system's average kinetic energy will also be higher, increasing the speed of the molecules.What does kinetic theory state?
The kinetic theory of matter states that all matter is made of small particles that are in random motion and that have space between them.
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Calculate the molality of a solution containing 14. 3 g of nacl in 42. 2 g of water
Answer:
5.80 M
Explanation:
In this problem, the solute is NaCl and the solvent is water. To find the molality, you need to (1) convert grams NaCl to moles NaCl (via molar mass), then (2) convert grams H₂O to kilograms H₂O, and then (3) calculate the molality (via molality equation). The final answer should have 3 sig figs to match the sig figs of the given values.
(Step 1)
Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol
Molar Mass (NaCl): 58.443 g/mol
14.3 grams NaCl 1 mole
-------------------------- x ------------------------ = 0.245 moles NaCl
58.443 grams
(Step 2)
1,000 g = 1 kg
42.2 grams H₂O 1 kg
-------------------------- x ----------------------- = 0.0422 kg H₂O
1,000 grams
(Step 3)
Molality = moles solute / mass solvent (kg)
Molality = 0.245 moles NaCl / 0.0422 kg H₂O
Molality = 5.80 M
A cylindrical grain has a base radius of 5m. the surface area is 1099m^2. What is the height of the bin to the nearest metre?
The height of the bin is 29.9m.
The quantity of space enclosing a three-dimensional shape's exterior is its surface area.
The total surface area of the cylinder formula is simply the sum of the base surface area and the lateral surface area.
The radius of the cylinder, r = 5m
Surface area = 1099 m²
∴ A = 2πrh + 2πr²
[tex]h = \frac{A- 2\pi r^2}{2\pi r}[/tex]
[tex]h = \frac{1099- 2 (3.141) 5^2}{2 (3.141) 5}[/tex]
[tex]h = \frac{1099- 157.05}{31.41}[/tex]
[tex]h = \frac{941.95}{31.41}[/tex]
[tex]h = 29.9 m[/tex]
Therefore, the height of the bin is 29.9m.
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what type of solution do you have if you dissolve 20.2 g of potassium chlorate in 0.300 L
solution of potassium chlorate,
K
C
I
O
3
, has 20 grams of the salt dissolved in 100 grams of water at 70 C. Approximately how many more grams of the salt can be added to the solution before reaching the saturation point?
An aerosol mixture of particulates and sulfur compounds form a grayish colored substance that is called ________. inversion smog industrial smog photochemical fog sulfuric aerosols industrial fog
An aerosol mixture of particulates and sulfur compounds form a grayish-colored substance that is called industrial smog.
What is Particulate Matter?Airborne particulate matter (PM) is a composite of several chemical species rather than a single contaminant. It consists of a complex mixture of solids and aerosols, including dry solid particles, liquid-coated solid cores, and minute liquid droplets. Particles can contain inorganic ions, metallic compounds, elemental carbon, organic compounds, and chemicals from the earth's crust. They can vary greatly in size, shape, and chemical makeup. For the goal of regulating air quality, the particle diameter is used.
Those that have a diameter of 10 microns or below (PM10) are inhalable and can have a negative impact on health. Particles with a diameter of 2.5 microns or less are considered to be fine particulate matter (PM2.5). Consequently, a percentage of PM10 is made up of PM2.5.
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What volume of benzaldehyde (ml) is 3 .00 mmol? the density of benzaldehyde is 1.045 g/ml.
The volume of benzaldehyde (ml) is 304.65 mL, if the density of benzaldehyde is 1.045 g/ml and having 3 mol.
Given,
Moles of benzaldehyde = 3 mol
Density of benzaldehyde = 1.045g/mol
Molar mass of benzaldehyde = 106.12 g/mol.
As we know that,
Moles can be calculated as
Moles = Given mass/ molar mass
3 = Given mass/ 106.12
Given mass = 318.36g.
The mass of benzaldehyde is 318.36g.
Now,
Density = mass/ Volume
1.045 = 318.16/ Volume
Volume = 318.36/1.045
Volume = 304.65 mL.
Thus, we find that the volume of benzaldehyde is
304.65 mL.
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