Consider the following exothermic reaction (with an enthalpy change of -514kJ) at equilibrium:
2 CO2 (g) <-----> 2 CO (g) + O2 (g)
Le Chatelier's principle states that the equilibrium partial pressure of CO(g) can be maximized by carrying out the reaction .
(a) at high temperature and high pressure
(b) at high temperature and low pressure
(c) at low temperature and low pressure
(d) at low temperature and high pressure
(e) none of the choices given here
Answers
The equilibrium partial pressure of CO(g) can be maximized by carrying out the reaction at low temperature and low pressure.
What does Le Chatelier's principle state?According to Le Chatelier's principle, when a dynamic equilibrium is disturbed by an external element, the equilibrium will move in a way that may counteract the effect of the external factor in order to maintain the equilibrium.
The given reaction is-
2CO₂(g) ⇄ 2CO(g) + O₂(g) (ΔH = -514 kJ)
Now, how does change in pressure and temperature affects the reaction-
Change in pressure:
The equilibrium will move toward the side where there are less moles of gas from the reaction as pressure rises. Additionally, when pressure drops, the equilibrium will move in favor of the side where there are more gas molecules involved in the process.
2.0 moles of gases are on the reactants side (on the left) and 3.0 moles are on the products side (on the right).
Therefore, lowering the pressure will cause the reaction to move to the side where there are more gas molecules (right side, products) and the equilibrium partial pressure of CO(g) can be maximized at low pressure.
Change in temperature:
The sign of H indicates that the reaction is exothermic (negative).
The concentration of the products side will decrease as the temperature drops, so the reaction will be moved to the right to counteract the temperature drop so that the equilibrium partial pressure of CO (g) can be maximized at low temperatures.
Hence the correct answer is low temperature and low pressure.
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Related Questions
A sample of an unknown compound is vaporized at 160 c . The gas produced has a volume of 2330 ml at a pressure of 1.00 atm ,and it weighs 2.10 g
Round answer to 3 significants digits
Answers
The molar mass is 3230.8 g/mol
How to determine the valueFirst, we need to know that the formula for the general gas law is represented as;
PV = nRT
such that the parameters are;
P is the pressureV is the volumen is the number of molesR is the gas constantT is the temperatureSubstitute the values
1 × 2.33 = n × 8.314 × 433.15
Multiply the values, we get;
n = 2.33/ 8.314 × 433.15
Divide the values
n = 6.5 × 10⁻⁴ moles
But, number of moles = mass/molar mass
Molar mass = 2.10/ 6.5 × 10⁻⁴
Molar mass = 3230.8 g/mol
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Phosphorus-32 (32P) is an isotope that is commonly used for medical and biological research. Phosphorus-32 has a half-life of 14.28 days. A researcher orders a sample of 32P that has an activity of 5.0 mCi when it arrives. If delivery of the sample took 48 hours, what was the activity of the sample when it was shipped from the manufacturer
Answers
The activity of the sample when it was shipped from the manufacturer is 4.54 mCi
How to determine the number of half-lives that has elapsedFrom the question given above, the following data were obtained:
Time (t) = 48 hoursHalf-life (t½) = 14.28 days = 14.28 × 24 = 342.72 hours Number of half-lives (n) =?n = t / t½
n = 48 / 342.72
n = 0.14
How to determine the activity of the sample during shipping Number of half-lives (n) = 0.14Original activity (N₀) = 5.0 mCiActivity remaining (N) =?N = N₀ / 2ⁿ
N = 5 / 2^0.14
N = 4.54 mCi
Thus, the activity of the sample during shipping is 4.54 mCi
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what are solubility curves
Answers
Answer:
The solubility curve helps us to predict which substance will crystallize out first from a solution containing two or more solutes. The solubility curve helps us to compare the solubilities of different substances at the same temperature.
I
Based on the information below, which of the following are atoms of the same element? (mark all that apply)
Atom A
Atom B
Atom C
8 protons
8 neutrons
8 electrons
10 protons
10 neutrons
10 electrons
8 protons
10 neutrons
8 electrons
end
Answers
Based on the information below . The atoms of the same element are Atom A and Atom C .
Atoms of same element have the same atomic number. so the number of protons and electron are same but they have different atomic masses called as Isotopes. so, the atoms having different number of neutron will have different masses.
In the given case ,
Atom A Atom B Atom C
8 protons 10 protons 8 protons
8 neutrons 10 neutrons 10 neutrons
8 electrons 10 electrons 8 electrons
so, In Atom A and Atom C , the number of protons and electrons are same but the have different atomic masses means having different no. of neutrons. so Atom A and Atom C are the atoms of same elements.
Hence,Based on the information below . The atoms of the same element are Atom A and Atom C.
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Which of the following choices describe the steps required to determine the empirical formula of a compound from the mass %? Select all that apply. Check all that apply. The mass percentage of each element is converted to moles using the mass mass formula molar mass If a compound contains 52% of mass of C, it can be assumed that there are 52 g of C in 100 g of the compound. Therato of atoms of each element must bo a rato of ntege nmbers If the sample contains 52 g of carbon, it is assumed that this compound has 52 mass percent of carbon. The mass percentages are divided among the smallest number to calculate the ratio of atoms of each element present.
Answers
The steps required to determine the empirical formula of a compound from the mass % are:
1. Convert the mass percentages of each element to moles using the molar mass formula.
2. Divide the mass percentages among the smallest number to calculate the ratio of atoms of each element present.
3. Ensure that the ratio of atoms of each element is a ratio of integer numbers.
What is empirical formula ?The empirical formula of a compound is the simplest whole number ratio of the elements present in the compound. It is often represented using the symbols of the elements involved and can be calculated from the relative masses of the elements. It is helpful in identifying the composition of a compound. For example, the empirical formula for glucose is CH2O, indicating that there is one carbon atom, two hydrogen atoms, and one oxygen atom present in the compound.
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A 25 L tank of oxygen under a pressure of.80 atm would require what pressure to
decrease the volume to 1.0 L?
Answers
Answer:
20 atm
Explanation:
Use the equation P1 x V1 = P2 x V2.
1) Rearrange the equation with algebra to solve for P2.
P2 = (P1 x V1)/ V2
2) Plug in to the equation where V1 = 25L, P1 = 0.80 atm, and, V2 = 1 L
P2 = (25L x 0.80 atm)/ 1L
3) Solve: P2 = 20 atm
The pressure required to reduce the oxygen's volume to 1 L would be 20 atm.
18. What is the evidence and reasoning that supports the claim that Earth's magnetic field is
generated bt motion of liquid metal, and not a permanent, solid magnet deep inside Earth.
Answers
Answer:
The inside of the Earth is too hot to hold a solid magnet therefore, there is liquid metals within the mantle and deeper. These metals flow around causing volcanic eruptions, earthquakes, and Earth's magnetic field.
Explanation:
WILL GIVE THE BRAINLIEST!!! help me pls
Answers
Answer:
Two of them are solids, one is liquid. Two of them are edible, one is not. One is a mixture, and two are not.
Explanation:
The smallest arteries in your body are called _____. arterioles capillaries veins bronchioles
Answers
Answer: arterioles
Explanation:
Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answers
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
Three examples of
solid and gas solution
Answers
Answer:
Solutions having solvent in solid-state and solute in the gaseous state are called gas-solid solution. Hydrogen is a gas at STP and platinum is solid. Hence, Hydrogen gas adsorbed on the surface of platinum is an example of gas in solid solution.
How do you identify a redox reaction?
Answers
Answer:
I think you have to calculate the oxidation number of each atom in the reaction.
Explanation:
Hope that helped! ^u^
Please Help!!!
Practice with Molecular Formulas
6. Determine the molecular formula for a compound that has an empirical formula of NO2 and a molar mass of 138.015 g/mol.
7. Nicotine is 74.1% C, 8.6% H, and 17.3% N by mass. It’s molar mass is about 160 g/mol.
a. What is it’s empirical formula?
b. What is it’s molecular formula?
Answers
The molecular formula for the compound is 3 times the empirical formula NO₂, which gives us N₃O₆.
6. In the molecular formula for a compound with an empirical formula of NO₂ and a molar mass of 138.015 g/mol,
The empirical formula tells us the simplest whole-number ratio of atoms in the compound, which in this case is NO₂. The molar mass of the empirical formula NO₂ can be calculated by adding the atomic masses of nitrogen (N) and two oxygen (O) atoms:
Molar mass of NO₂ = (1 × atomic mass of N) + (2 × atomic mass of O)
Molar mass of NO₂ = (1 × 14.01 g/mol) + (2 × 16.00 g/mol)
Molar mass of NO₂ = 46.01 g/mol
Molecular formula units = Molar mass of the compound / Molar mass of the empirical formula
Molecular formula units = 138.015 g/mol / 46.01 g/mol
Molecular formula units ≈ 3
7. a. To determine the empirical formula of nicotine given the mass percentages of carbon (C), hydrogen (H), and nitrogen (N), we can assume a 100 g sample of nicotine.
Mass of C in 100 g of nicotine = 74.1 g
Mass of H in 100 g of nicotine = 8.6 g
Mass of N in 100 g of nicotine = 17.3 g
To find the moles of each element, divide the mass by their respective atomic masses:
Moles of C = 74.1 g / atomic mass of C ≈ 74.1 g / 12.01 g/mol ≈ 6.17 mol
Moles of H = 8.6 g / atomic mass of H ≈ 8.6 g / 1.008 g/mol ≈ 8.53 mol
Moles of N = 17.3 g / atomic mass of N ≈ 17.3 g / 14.01 g/mol ≈ 1.23 mol
To obtain the simplest ratio between the elements, divide the number of moles by the smallest number of moles, which in this case is 1.23 mol:
C ≈ 6.17 mol / 1.23 mol ≈ 5
H ≈ 8.53 mol / 1.23 mol ≈ 7
N ≈ 1.23 mol / 1.23 mol ≈ 1
Therefore, the empirical formula of nicotine is C₅H₇N.
b. To determine the molecular formula of nicotine, its molar mass, which is given as approximately 160 g/mol.
The empirical formula of nicotine is C₅H₇N, with a molar mass of:
(5 × atomic mass of C) + (7 × atomic mass of H) + (1 × atomic mass of N)
(5 × 12.01 g/mol) + (7 × 1.008 g/mol) + (1 × 14.01 g/mol)
60.05 g/mol + 7.056 g/mol + 14.01 g/mol
≈ 81.116 g/mol
To find the molecular formula, the molar mass of nicotine (160 g/mol) by the
Molecular formula ratio = 160 g/mol / 93.131 g/mol
≈ 1.717
Therefore, the molecular formula of nicotine is 2 times the empirical formula: C₁₀H₁₄N₂.
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1. 50 cm³ of 0.5 l/dm³ MagH solution and 50cm²³
Assignment
of O-Sund Idm HNOS
were mixed at 20°C and Stirred
calorimeter with negligible heat capacity. The
temperature
of each solution is 10g|am³ and the specific heat capauly
of the muxture rose to 23-2°C. The density
of each solution is 4-18 J|K|g. Calculate:
1. The enthalpy for the neutralization.
in enthalpy per mole of water.
Calculate the change
formed
2. Given the following reactions and their respective.
enthalpy changes:
C3Hg) +50₂
3 CO₂ + 4H₂016 AH = -2213kJlmol
Cs) + O₂cy CO₂51; OH = -393-7 kJ/mol
H₂₂) + ≤0₂19 → H₂O(1) AH = -285.9 kJ/mol
→
Calculate DH for the Chemical reaction:
3 Col + 4H₂g)
→
C3 Hz (g)
= XkJ lugl
Answers
100 Cc of 40°C Water is Contained in a Calorimeter with Negligible Heat Capacity. It takes 5 minutes for the water to cool to 35°C.
What does negligible heat capacity mean?Since the vessel has a very low heat capacity, you can conclude that the water is gaining all of the heat that the copper is losing. Decide on q=mc*deltaT for the copper and water, and then compare the temperatures.They can't be negative, though. How much energy must be added in order to raise a substance's temperature by a specific amount is known as its heat capacity. Since this is endothermic, it must be advantageous.In a calorimetric measurement, either (a) a process that is exothermic occurs and heat (q), which is negative, indicating that thermal energy is transferred from the system to its surroundings, or (b) a process that is endothermic occurs and heat (q), which is positive, indicating that thermal energy is transferred from the surroundings to.To learn more about Calorimeter refer to:
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draw tryptophan and select the chiral carbon atom. a selected atom will turn green.
Answers
A carbon atom that is joined to four separate atom kinds or groups is known as an asymmetric carbon atom.
What is chiral carbon atom?A carbon atom that is joined to four separate atom kinds or groups is known as an asymmetric carbon atom. As a general rule, chiral carbon center's are carbon atoms positioned at the four corners of a tetrahedron and attached to four distinct substituents. Steatogenic carbons and asymmetrical carbon atoms are other names for chiral carbon atoms. Search for carbons that are bonded to four different substituents if you want to find chiral carbons. Any carbon atoms with double bonds or two hydrogen atoms connected can be promptly removed. We discover that there are three chiral carbons as a result of this.Tryptophan is the only amino acid that has two rings on it. At pH 7.4, it looks like this,
You can see the chiral carbon highlighted. You can tell that it's an \($s p^3$\)carbon and that it has four different substituents on it \(( $\mathrm{H}, \mathrm{NH}_3^{+}, \mathrm{COO}^{-}$, and $\mathrm{CH}_2-$ stuff).\)
Therefore it's chiral.
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Question 32. If scientist make an observation that does not agree with an accepted scientific theory, the scientists should
PLEASE HURRY
Answers
Answer:
I would say A.
Explanation:
If d represents the density of a gas and k is a constant. The relationship between the rate of diffusion r, and d is ____?
Answers
The relationship between the rate of diffusion r, and d is r ∝ 1/√d.
The relationship between the rate of diffusion (r) and the density of a gas (d) can be explained using Graham's law of diffusion. According to this law, the rate of diffusion of a gas is inversely proportional to the square root of its density. Mathematically, it can be expressed as:
r ∝ 1/√d
where the symbol '∝' represents 'proportional to'. The constant of proportionality (k) can be introduced to this equation as:
r = k/√d
This equation shows that as the density of a gas increases, its rate of diffusion decreases. This is because denser gases have more molecules per unit volume and thus, they experience greater intermolecular collisions that hinder their movement. Therefore, it requires more energy for them to diffuse through a medium compared to less dense gases.
The relationship between the rate of diffusion and density is particularly important in understanding the behavior of gases in different environments. For instance, in a gas chromatography column, the rate of diffusion of a gas determines how quickly it moves through the column and separates from other components. Similarly, in the Earth's atmosphere, the rate of diffusion of greenhouse gases such as carbon dioxide affects their concentration and hence, their impact on climate change.
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1. When an object's temperature increases, what happens to the molecules
Answers
Answer:
the degree of their disorderliness increases
How to calculate the orbital period of earth
Answers
Answer:
By observing the time between transits, we know the orbital period. Kepler's Third law can be used to determine the orbital radius of the planet if the mass of the orbiting star is known (R3=T2−Mstar/Msun, the radius is in AU and the period is in earth years)
hope this helps you out
If the average basal rate of oxygen consumption for an adult is 15 L/hour, then calculate how many hours of oxygen use will you get from the 4.7 L tank? Round your answer to 1 decimal place.
Answers
Answer:
0.3 hours of oxygen use will be obtained from the 4.7 L tank.
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
To solve a direct rule of three, where a, b and c are known data and x is the value to be calculated the following formula must be followed:
a ⇒ b
c ⇒ x
So \(x=\frac{c*b}{a}\)
A value of 15 L/hour indicates that 15 L is consumed in 1 hour. The following rule of three can then be applied: if the average basal rate of oxygen consumption for an adult is 15 L in 1 hour, then 4.7 L in how long will it be consumed?
\(time=\frac{4.7 L*1 hour}{15 L}\)
time= 0.3 hours
0.3 hours of oxygen use will be obtained from the 4.7 L tank.
Which statement describes a digital signal?
Answers
Answer:
digital signal
Answer:
Its made of numbers
Explanation:
did the assignment, hope this helps :]
Based on the reactions:
1. 2NO2 (g)N2O4 (g) H1 = - 57.2 kJ
2. 2NO(g) + O2 (g)2NO2 (g) H2 = -114.1 kJ
Use Hess's law to calculate H for:
2NO(g) + O2 (g)N2O4 (g)
Answers
Using Hess's law H2NO(g) + O2 (g) => N2O4 (g) ; Δ H = -55.3 KJ.
Using Hess's law
ΔH = Σ enthalpies of reactants - enthalpies of product
-114.1 - (- 57.2 k)
= 55.3 KJ.
Hess' Law can be used to calculate enthalpy changes that are difficult to measure directly. Hess' law is used to calculate the enthalpy change for the formation of methane CH4 from solid carbon, and hydrogen gas, a reaction too slow to be measured in the laboratory. Enthalpy H is the sum of internal energy U and the product of pressure and volume PV and is given by the formula H=U+PV. If the process occurs at constant pressure
The heat produced released or absorbed is equal to the change in enthalpy. Hess studied thermochemistry and published his laws of thermochemistry in 1840. To apply Hess' law, all steps of a chemical reaction must take place at the same temperature. Hess' law can be used to calculate entropy and Gibb energy in addition to enthalpy. total internal energy. And pressure x volume.
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Which subatomic particle has the least mass?
electron
proton
neutron
the atom
Answers
Answer:
election
Explanation:
HOW DOES WALTER WHITE SLEEP AT NIGHT
Answers
Answer:
Since Walter can alter time and space he doesn't have the kind of place to take a nap or buy a cap for his dog zap
Explanation:
Answer:
Breaking Bad
Explanation:
walt
An unknown alkene is ozonolyzed and worked up under oxidizing conditions. The H NMR spectrum of the only product obtained is shown. Identify the alkene.
Answers
To identify the unknown alkene based on its H NMR spectrum, a qualified organic chemist would need to analyze the chemical shifts, integration values, and splitting patterns of the peaks in the spectrum, and compare them with known reference data and other spectroscopic techniques (such as C NMR, IR, and mass spectrometry) to make an accurate determination.
The alkene is likely to be a symmetrical alkene with two equivalent methyl groups attached to the double bond. This can be seen from the singlet at 1.7 ppm, which is characteristic of a methyl group, appearing twice in the spectrum. The ozonolysis of the alkene would lead to the formation of two carbonyl compounds, which are then oxidized to carboxylic acids under the given oxidizing conditions. Therefore, the alkene in question is likely to be cis-2-butene.
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Which of the following is a reasonable ground-state electron configuration? (3 points)
1s21p5
1s22s22p8
1s22s22d4
1s22s22p6
Answers
The reasonable ground-state electron configuration would be \(1S^2,2S^2,2P^6\)
Electron configurationAccording to the rules of electron configurations, lower energy level orbitals are filled before higher energy level orbitals.
Thus, the order of filling orbitals according to their energy levels would be: 1S, 2S, 2P, 3S, 3P. etc.
Also, there is a need to be conversant with the number of electrons each orbital can take. S can only take 2, and P can take a maximum of 6 electrons.
Thus, the only reasonable electron configuration would be \(1S^2,2S^2,2P^6\)
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for the following reaction how many grams of h20 will be produced if you react 3.7 grams of B2H6? B2h6 +3O2-2hbo2+ 2 H20
Answers
Answer:
4.8 g H₂O
Explanation:
To find the mass of water, you need to (1) convert grams B₂H₆ to moles B₂H₆ (via molar mass from periodic table), then (2) convert moles B₂H₆ to moles H₂O (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles H₂O to grams H₂O (via molar mass from periodic table).
It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 2 sig figs because the given value (3.7 grams) has 2 sig figs.
Molar Mass (B₂H₆): 2(10.811 g/mol) + 6(1.008 g/mol)
Molar Mass (B₂H₆): 27.67 g/mol
1 B₂H₆ + 3 O₂ ---> 2 HBO₂ + 2 H₂O
^ ^
Molar Mass (H₂O): 15.998 g/mol + 2(1.008 g/mol)
Molar Mass (H₂O): 18.014 g/mol
3.7 g B₂H₆ 1 mole 2 moles H₂O 18.014 g
---------------- x --------------- x ----------------------- x ----------------- = 4.8 g H₂O
27.67 g 1 mole B₂H₆ 1 mole
The pOH of a solution is 6.0. Which statement is correct?
Use pOH = -log[OH-] and PH+pOH = 14.
The pH of the solution is 20.0.
O The concentration of OH ions is 1.0 x 108 M.
The concentration of OH ions is 1.0 x 106 M.
O The pH of the solution is 8.0.
A
Answers
At pOH value of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)
In this question we will apply the formula
pH +pOH = 14 . . . . . . . . . . . . .(1)
where pH = concentration of [\(H^{+}\) ] ion
pOH = concentration of [\(OH^{-}\) ] ion
As per the question
pOH =6.0
Putting the value of pOH in equation (1) we get the value of pH
pH + 6.0 =14
pH = 14 -6.0
pH = 8.0
The value of pH if the pOH value is 6.0 is 8.0
To find the concentration of \(H^{+}\) ion we will use the following formula
This is calculated by the formula
[\(H^{+}\)} = \(10^{-pH}\)
where we will write the values of pH
Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)
Therefore at pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)
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The complete question is -
What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?
Fe(NO3)3
Percent composition
Answers
Answer:
Fe: 23.1%
N: 17.4%
O: 59.5%
Explanation:
You take the grams that each weigh on the periodic table and add it all up. Afterward you create fractions of each over the whole. (Example: Fe/Fe+N+O) then you divide and turn that decimal into a percentage.
What is the style of Vincent Van Gogh's Starry Night (1889)?
Post Impressionism
Symbolism
Pointilism
Surrealism
Answers
The style of Vincent Van Gogh's Starry Night (1889) is Post-Impressionism.
Understanding post-impressionalismPost-Impressionism is an art movement that developed in France in the late 19th century as a reaction against the limitations of Impressionism. It is characterized by a focus on subjective emotions and personal interpretations of the world, as well as an interest in the formal qualities of art, such as color, line, and form.
Van Gogh's work is known for its expressive use of color and texture, and Starry Night is a prime example of his Post-Impressionist style, with its swirling brushstrokes, intense colors, and dreamlike quality.
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