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AP Chem Unit 07 Days 03-04 Practice

Authored by Patrick Boylan

Chemistry

11th Grade

NGSS covered

Used 68+ times

AP Chem Unit 07 Days 03-04 Practice
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6 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A mixture consisting of 0.250 mol N2(g) and 0.500 mol H2(g) in a 1.0 liter flask reaches equilibrium according to the equation

N2(g) + 3 H2(g) ⇄ 2 NH3(g)

At equilibrium, there are 0.150 mol of ammonia. Calculate the number of moles of H2(g) at equilibrium.

0.175 mol H2

0.275 mol H2

0.425 mol H2

0.075 mol H2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A(g) + 2B(g) ⇄ C(g) + 2D(g)

Equal numbers of moles of A and B are placed in a rigid flask at a given temperature and allowed to reach equilibrium according to the equation above. Which of the following must be true at equilibrium?

The [A] must be less than the [B], and [C] must equal [D].

The [A] must be less than the [B], and [C] will differ from [D].

The [A] must be greater than the [B], and [C] must equal [D].

The [A] must be greater than the [B], and [C] will differ from [D].

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

CO2(g) + H2(g) ⇄ H2O(g) + CO(g)

H2O(g) and CO(g) are inserted into an evacuated, rigid flask so that the initial partial pressures of each of them are 2.40atm and 1.80atm respectively. The reaction is carried out at constant temperature. What is the partial pressure of H2(g) when the partial pressure of H2O(g) has decreased to 1.60atm?

0.80atm

1.00atm

1.20atm

1.60atm

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Consider the reaction

PCl5(g) ⇄ PCl3(g) + Cl2(g)

At a certain temperature, the initial concentration of PCl5(g) is 8.0 M and at equilibrium the concentration of Cl2(g) is 6.0 M. Calculate the value of Kc at this temperature.

2.0

6.0

18

36

Tags

NGSS.HS-PS1-7

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A(g) + 2B(g) ⇄ C(g) + 2D(g)

When 1.5 mole of A and 2.0 mole of B are placed in an evacuated 1.00-liter flask, the reaction represented above occurs. After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.75 mole of C. Based on these results, the expression for the equilibrium constant, Kc, of the reaction is

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Media Image
Media Image
Media Image

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

H2(g) + I2(g) ⇄ 2 HI(g)

 

The equilibrium constant, Kc, for the reaction above is 25 at 298K. If 28.0 mol of HI are introduced into a 2.00 liter vessel, how many moles of HI are present at equilibrium?

2.0 moles HI

4.0 moles HI

10.0 moles HI

20.0 moles HI

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-6

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