Chemistry College

At a certain temperature the reaction
CO2(g) + H2(g) ↔ CO(g) + H2O(g) has Kc = 2.50.
If 2.00 mol of carbon dioxide and 1.5 mol of hydrogen are placed in a 5.00 L vessel and equilibrium is established, what will be the concentration of carbon monoxide?

Answers

Answer 1

The concentration of carbon monoxide at equilibrium is 0.209 M.

Concentration of each gas

CO2 = 2 mol/5 L = 0.4

H2 = 1.5 mol/5L = 0.3

ICE table

Create ICE table as shown below

CO2(g) + H2(g) ↔ CO(g) + H2O(g)

I 0.4 0.3 0 0

C - x - x x x

E 0.4 - x 0.3 - x x x

Kc = [CO][H₂O] / [CO₂][H₂]

2.5 = (x²)/(0.4 - x)(0.3 - x)

x² = 2.5(0.4 - x)(0.3 - x)

x² = 2.5(0.12 - 0.7x + x²)

x² = 0.3 - 1.75x + 2.5x²

0 = 1.5x² - 1.75x + 0.3

solve the quadratic equation using formula method;

x = 0.209

Thus, the concentration of carbon monoxide at equilibrium is 0.209 M.

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Related Questions

Which defines the average inetic energy of a system's particles?
O density
O pressure
O temperature
O volume

Answers

Answer:

Temperature

Explanation:

Because Temperature is a measure of the average kinetic energy of all the molecules in a gas. As the temperature and, therefore, kinetic energy, of a gas changes, the RMS speed of the gas molecules also changes. The RMS speed of the molecules is the square root of the average of each individual velocity squared.

4. Distinguish where kinetic energy and potential energy are the greatest in the loop.

Answers

Kinetic energy is the energy from movement. Hence the fastest movement is at the bottom of the loop - therefore Kinetic energy is highest at the flat bottom of the loop.

Potential energy is the opposite - it occurs at the top of the loop when the car moves the slowest

Why 5.67 + 0.00032 = 5.67 (and not 5.7 or 5.67032 or any other number).

Answers

Answer:

5.67 + 0.00032 = 5.67032

Usually for decimal answers, we write 2 digits that come after decimal. We can't write all the numbers that come after the decimal because sometimes it can go on for infinte times, so we write the 2 numbers that come after decimal. So, 5.67 is the answer.

5.7 is also right if you round off the answer but 5.67 is more accurate.

Hope this helped!

Pls mark brainliest

Answer:

For the question given, this shows that the answer is in 2 d.p. (2 decimal places). This means that the final answer has been rounded to 2 numbers after the decimal point!

We know that it would be 5.67 as the number after the 7 is 0, this means that the answer would be rounded down or in other terms the 7 would stay the same.

When answering a question, most of the time we would be told what decimal place to round the number to!

Hope this helps, have a lovely day! :)

Identify the substance that has formula mass of 133.5amu.
(a) MgCI
b)SCI
c)BCI
D) AICI

Answers

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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During a class presentation, your classmate explains that plants perform photosynthesis and animals perform cellular respiration. In your own words, describe what these processes are and explain why your classmate’s statement is correct or incorrect. will give brain

Answers

Answer:

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. ... This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.

Hello
I got the question
"At pH 2,7 glutamic acid has the acid fraction 0,166. Calculate how that is correct"
I dont know what to do. Can anyone help me please :-)

Answers

In order to calculate whether the statement "at pH 2.7, glutamic acid has the acid fraction 0.166" is correct, you would need to know the pK values of glutamic acid.

What is the pK values of glutamic acid?

The acid fraction, also known as the protonation state, of an amino acid can be calculated using the Henderson-Hasselbalch equation, which is:

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

where pK is the acid dissociation constant of the acid in question (in this case, glutamic acid), [base] is the concentration of the deprotonated form of the acid, and [acid] is the concentration of the protonated form of the acid.

In the case of glutamic acid, the pH is 2.7 and the acid fraction is 0.166. Using the Henderson-Hasselbalch equation, calculate the pK of glutamic acid as:

2.7 = pK + log(0.166/(1-0.166))

Solving for pK, we can see that the pK of glutamic acid is about 2.7 which confirms the statement that at pH 2.7, glutamic acid has the acid fraction 0.166 is correct.

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The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 1.7 cm by 3.0 cm by 12.9 cm.

Answers

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

what is this chemical molecule

Answers

The color codes can help us to know the formula of the molecule.

How do you know the chemical formula from a molecular model?

To determine the chemical formula from a molecular model, you need to identify the types and numbers of atoms in the molecule. Each atom is represented by a different symbol, such as H for hydrogen, C for carbon, and O for oxygen.

We do not have the color codes for the atoms in the molecule here thus we can't be able to tell for sure what the molecule should be. If we did have it, then the molecule can be known from the color codes.

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6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100

Answers

the answer should be 1.38 molecules

Which one contains the most molecules?
a)balloon filled with carbon dioxide
b)balloon filled with chlorine gas
c)balloon filled with nitrogen gas
d)All the three balloons contain the same number of molecules.

Answers

C)Balloon filled with nitrogen gas

The Lewis representation above depicts a reaction between hydrogen (blue) and a main-group element from group 5A (red). In this representation, each Y atom needs electron(s) to complete its octet, and gains these electrons by forming bond(s) with atoms of H . There are unshared electron pair(s) and bonding electron pair(s) in the product molecule. The bonds in the product are _________ .

Answers

Answer:

Each Y atom needs three electrons to complete its octet by forming three bonds to hydrogen. There is one unshared pair of electrons and three bonding pairs of electrons. The bonds in the product are covalent.

Explanation:

Recall that group 5A elements contain five electrons in their outermost shell. These five electrons consists of a lone pair and three electrons that can form three bonds with hydrogen to give YH3 where Y is the group 5A element.

The YH3 molecule contains one lone(unshared) pair of electrons as well as three bonding pairs of electrons. The compounds are covalent.

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)
(a) Balance the equation.
(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete
combustion reaction?

Answers

Answer:

1120 gm

Explanation:

6. Consider the reaction: CzHo (g) + 02 (8) - 4 CO2(g) + 6H2O (1)

(a) Balance the equation.

(b) How many grams of oxygen are required to react with 10 moles of ethane for a complete

combustion reaction?

FIRST, CORRECT THE EQUATION THEN BALANCE

2C2H6(G) + 7O2------------> 4CO2 + 6H2O

so for 10 moles of ethane, we need

7 X 5 = 35 MOLES O2

=35 MOLES O2

O2 HAS A MOLAR MASS OF 2X16 = 32 gm

35 MOLES OF O2 HAS A MASS OF 35 X 32 =1120 gm

Can someone please help me with chemistry?

Show steps+ explanation

Answers

The student expected to get exactly 3.5 grammes of Chromium (III) oxide from adding 1.75 grammes of Chromium trinitrate and 1.75 grammes of Sodium oxide. To create the needed amount of Chromium oxide.

How are actual yields in grammes calculated?

To get the mass per mole, divide the reactant's mass by its molecular weight. As an alternative, we might multiply the millilitres of the reactant solution by the grammes per millilitre of the liquid solution. Next, divide the outcome by the reactant's molar mass.

This is because the chemical equation for the reaction between Chromium trinitrate and Sodium oxide is not balanced to produce Chromium(III) oxide.

2Cr(NO₃)₃ + 3Na₂O → Cr₂O₃ + 6NaNO₃

From this balanced equation, we can see that for every 2 moles of Chromium trinitrate, we need 3 moles of Sodium oxide to produce 1 mole of Chromium(III) oxide. This means that the amounts of Chromium trinitrate and Sodium oxide required to produce 3.5 grams of Chromium(III) oxide are:

Amount of Chromium trinitrate = (2/3) x (3.5 grams / molar mass of Chromium trinitrate) = 1.53 grams

Amount of Sodium oxide = (3/2) x (3.5 grams / molar mass of Sodium oxide) = 2.26 grams

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2.
Which mixture could be a useful buffer in a solution?

acetic acid (CH3CO2H) and hydrochloric acid (HCl)
sodium hydroxide (NaOH) and elemental sodium (Na)
ammonia (NH3) and ammonium chloride (NH4Cl)
acetic acid (CH3CO2H) and ammonia (NH3)

Pls answer quickly

Answers

Ammonia ($NH_3$) and ammonium chloride ($NH_4Cl$) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid ($CH_3CO_2H$) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid ($CH_3CO_2H$), a weak acid, and ammonia ($NH_3$), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia ($NH_3$), is a weak base, and ammonium chloride ($NH_4Cl$) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia ($NH_3$) and ammonium chloride ($NH_4Cl$), is the suitable mixture that could be a useful buffer in a solution.

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Two dogs, one with spots and one with no spots have the same mass and
are running with different velocities. Dog 1 (Dog with no spots) has a
velocity of 1 m/s while Dog 2 (Dog with spots) has a velocity of 2 m/s.
Which dog has a larger kinetic energy and how much larger is its kinetic
energy compared to the other dog

Answers

Answer:

dog 2 because it is running 1m faster a second than dog 1. Dog 2 can run 1 meter farther in a second than the other dog.

What is the volume of 1g of ice in cm3?

Answers

Answer:

What is the volume of 1g of ice in cm3?

Explanation:

5 A scientific method is a way to investigate a scientific problem. Although the order of steps can vary, the tasks performed during each step often stay the same. During which step of the scientific method would a scientist collect data? A developing a plan B forming a hypothesis testing the hypothesis D communicating the results

Answers

Can somebody go and help me with my work?

Answer:

Explanation:

Depends on what data he wants, if its results he would collect it after he creates and tests the hypothesis, we’re as if he wanted to spread his results around he would comminicate the results with people of his choosing.

so its most likely B if he wants to collect his data

and its most likely D if hes already collected the results and he is going to reveal them to his choice of people.

H2SO4(aq)+NaOH(s)> (neutralization of both acidic protons)

Answers

H2SO4(aq)+NaOH(s)----->NA2SO4 + H20

When acid and base reaction takes place, it will form salt formation takes place. I.e., neutralization reaction. H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.

What is neutralization reaction?

A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.

H₂SO₄ is an acid and NaOH is a base. Acid react with base to form salt and water. Salt will be neutral charge and net ionic charge is zero.

Neutralization takes place when, complete dissociation takes place. If any partial dissociation, it will form acidic salt or neutral salt.

Thus complete dissociation neutral reaction is

H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.

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How many possible combinations are there for the values of l and ml when n = 3?

Answers

There are three possible values for the l and there are nine possible values for ml.

What are quantum numbers?

The term quantum numbers has to do with the description that shows the most probable position of the electron in an atom. We know that the orbital is a region in space, where there is a high probability of finding the electrons.

Given that the values of l must be in the range of 0 to n - l and the values of ml must be in the rang of -l to + l. we then can use this to know the number of the possible combinations of l and ml when n = 3.

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What types of materials are better at absorbing energy from radiation?

Answers

Answer:

Explanation:

Materials are clothes and heavy rope

Why would it not be practical to count atoms or molecules in dozen, like we do donuts?

Answers

Answer: We can point out two main reasons: atoms and molecules are too small to bee seen without the help of complex equipments and there are too many particles (atoms or molecules) in a small amount of substance (6.022 x 10^23 particles per mol of substance).

Explanation:

The question requires us to explain why atoms and/or molecules can't be count in dozen.

We can point out two main reasons for why it is not practical to count atoms and molecules the way we do with donuts and eggs, for example:

- The first one is the size of this particles. We need powerful and complex equipments to be able to see atoms and molecules. The size of atoms, for example, is measured in Angstroms, which corresponds to 10^-10 meters. Although molecules are slightly bigger, they are still too small to be seen without complex microscopes.

- Considering that we were able to see atoms and molecules in order to count them, there would be another issue: the amount of atoms and/or molecules contained in small amount of substances is too big. For example: let's consider 18 g of water, which corresponds to approximately 1 mol of this substance; in 18 g of water there are 6.022 x 10^23 molecules of water - which is way more complex than counting a dozen (12) units of donuts, for example.

Which of the following is NOT true of zinc?
-Excess zinc can decrease copper absorption.
-Grains are the most reliable food sources of zinc.
-All of its functions involve it acting as a cofactor for enzymes.
-It binds to most proteins in the body.

Answers

while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

How to solve the problem?

The statement that is NOT true of zinc is "Grains are the most reliable food sources of zinc." While grains can be a source of zinc, they are not necessarily the most reliable source.

Zinc is an essential mineral that plays important roles in many biological processes, including immune function, protein synthesis, wound healing, and DNA synthesis. It is involved in various enzymatic reactions, and acts as a cofactor for many enzymes. Zinc is also important for proper growth and development, especially during childhood and adolescence.

Excess zinc intake can lead to decreased copper absorption, as both minerals compete for absorption in the intestines. This can lead to copper deficiency, which can cause anemia neutropenia, and other health problems. Therefore, it is important to maintain a balance between zinc and copper intake.

While grains can be a source of zinc, other foods such as meat, seafood, and dairy products are also good sources. Vegetarians and vegans may need to pay particular attention to their zinc intake, as plant-based sources of zinc may be less bioavailable than -based sources. Zinc supplements can also be used to prevent or treat deficiencies, but should be used with caution as excessive intake can have negative health effects.

In summary, while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

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Critically discuss the refusal/unwillingness of some individuals to answer questions to put them by authorized Stats SA officials

Answers

People refuse to answer questions from authorized Stats SA officials because they don't want to reveal confidential information.

What does official stats refer to?

An official Stats is an official who has the function of asking citizens for different information in order to establish general statistics for all citizens.

Why don't people answer your questions?

Some people refuse to answer questions out of mistrust, because they don't want to share personal information.

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If you needed to make 2.5 L of a 0.2 M fruit drink solution from the 0.7 M drink solution, how would you do it? (Hint: Use McVc = MdVd to find the amount of concentrated solution you need, then add water to reach 2.5 L.) Show your work.

Answers

The volume of solution needed if I need to make 2.5 L of a 0.2 M fruit drink solution from the 0.7 M drink solution is 0.714L.

How to calculate concentration?

The concentration of a solution can be calculated using the following formula;

McVc = MdVd

Mc and Vc = initial concentration and volume Md and Vd = final concentration and volume

According to this question, one needed to make 2.5 L of a 0.2 M fruit drink solution from the 0.7 M drink solution. The final volume needed is as follows:

2.5 × 0.2 = 0.7 × V

0.5 = 0.7V

V = 0.714L

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Copper sulfate is made of one copper (Cu) atom, one sulfur (S) atom, and four oxygen (O) atoms. Write the chemical formula correctly.

Answers

The chemical formula for copper sulfate is CuSO4

Which strand of hydrocarbons is used to produce plastic?
O Strand 2
O Strand 3
O Strand 4
●Strand 1

Answers

The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Which atom has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²? and 1s²2s²2p⁶3s²3p⁶3d⁷4s²?

Answers

1 is correct as d sub shell cannot hold more than 6 electrons
Hope it helps : )

Chlorophyll is found in
A. neither plant
nor animal cells.
B. animal cells.
C. plant cells.
D. plant and animal cells.

Answers

Answer:

Only plant cells

Explanation:

This organelle helps plants photosynthesize. Humans do not do that.

Which of the following is the correct definition of nuclear energy? A. energy of an object due to the random motion of its atoms and molecules B. energy an object has because of its motion or position C. energy produced from the splitting of atoms D. energy resulting from the flow of charged particles, such as electrons or ions

Answers

Answer:

c. energy from splitting energy

Explanation:

2) 183 cg =
kg
5
.00183 kg
0.0183 kg
.183 kg
3) 0.25 kg =
g

Answers

Answer:

183 cg = 0.00183 kg

0.25 kg = 250 g

Explanation:

Use conversion factors. 1kg is equal to 1 x 10^5 cg (100000) and 1 kg is equal to 1 x 10^3 grams (1000 grams).

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a bullet is shot into a wood block. the bullet becomes embedded in the block, and they move off the ledge and land on the ground. the mass of the bullet is 2 g. the mass of the block is 98 g. the ledge height is 5 m. the block lands 10 m horizontally from the ledge. determine the initial speed of the bullet. let me see your literal equations first. help- Which territory was NOT part of the Carolingian territory?GermanyFrancenorthern ItalyPoland Consider the circuit shown. Note that this is the same circuit as shown in Figure 1 of the lab (and it is the same circuit that you will build in lab), except that I have chosen the direction of the two loops (the two gray arrow loops) to be opposite of how they are in Figure 1 of the lab. Note that the choice of direction in the loops is arbitrary, meaning that you'll get the same answer no matter how you draw your loops a) Use the loop and junction rules to write down the three equations for circuit drawn to the right that correspond to Equations (1), (2), and (3) in the lab. Loop 1 12 b) Why aren't the resistors R1 and R2 in series? Why aren't they in parallel? a 10 kg bomb is sliding across an ice rink southward at 6 m/s. it explodes. piece 1 with a mass of 2 kg moves southward at 12 m/s. find the direction and magnitude of the velocity of mass 2. While initial meetings may depend on surface-level diversity in making attempts to understand other individuals, studies show that after time ________ and ________ become more important to understanding the other individual. during which step of the marketing plan do marketers make important decisions about how they will allocate their scarce resources to their various products and services? multiple choice question. 6.2(2x+1)= 7/34 What is the answer? Determine the isotope symbol that fits each description. a. 68 neutrons, 47 electrons b. mass number = 197, 79 electrons c. atomic number = 86, 136 neutrons d. atomic number = 76, mass number = 192 An array of values passed into a function is typically synthesized into Block RAM. Select one: True False If there are data dependencies in the code, HLS will schedule computation in different clock cycles. Select one: True False Sureena said, "Woyld you like to marry me?" 18. _______ pastel quieres? *a. qub. culc. cules19. ______ es la sangra? *a. qub. culc. cules20. ______ es tu restaurante favorito? *a. qub. culc. cules Evaluate f+g^2-3g if f= 5 and g=2 f(x)=-2x^2-2x+10 f(x)=2x 2 2x+10 \text{Find }f(2) Find f(2) You (an officer) are by yourself driving through an area that has several retail stores. You witness a man grab a woman's purse. The two of them are struggling for the control of the purse. The man starts to strike the woman with his hands.What would you do?Under what authority would you be justified? a country has a (an) in the production of a good it produces at lower opportunity cost than another country. group of answer choices absolute advantage tariff-efficient advantage specialization disadvantage none of the above infant-industry advantage using ladder operators find and for the state|s> = A(|011> + 2i|101> +3exp(i(pi)/4)|210>) Use the following information for ECE incorporated: Shareholder Equity $100 million Assets $200 million Sales $300 million Net Income $15 million Interest Expense $2 million If ECE's stock is currently trading at $24.00 and ECE has 25 million shares outstanding, then ECE's market-to-book ratio is closest to: a woman who is 24 weeks pregnant is placed on an intravenous infusion of magnesium sulfate. what side effect should the nurse inform the patient that she might experience? Plz help with the homework I need help with this question, thank you

At a certain temperature the reaction CO2(g) + H2(g) ↔ CO(g) + H2O(g) has Kc = 2.50. If 2.00 mol of carbon dioxide and 1.5 mol of hydrogen are placed in a 5.00 L vessel and equilibrium is established, what will be the concentration of carbon monoxide?

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At a certain temperature the reaction
CO2(g) + H2(g) ↔ CO(g) + H2O(g) has Kc = 2.50.
If 2.00 mol of carbon dioxide and 1.5 mol of hydrogen are placed in a 5.00 L vessel and equilibrium is established, what will be the concentration of carbon monoxide?