1. The average rate of disappearance of ozone in the reaction is found to be 9.18 × 10–3 atm over a certain interval of time. What is the rate of appearance of O2 during this interval?

a. 13.8 × 10–3 atm/s

b. 9.18 × 10–3atm/s

c. 6.12 × 10–3atm/s

d. 387 × 10–3atm/s

e. 28.1 × 10–3atm/s

ANSWER: a

POINTS: 1

2. The balanced equation for the reaction of bromate ion with bromide ion in acidic solution is given by:

At a particular instant in time, the value of –Δ[Br–]/Δt is 2.4 × 10–3 mol/L s. What is the value of Δ[Br2]/Δt in the same units?

a. 1.4 × 10–3

b. 2.4 × 10–3

c. 4.0 × 10–3

d. 1.2 × 10–3

e. 2.0 × 10–3

ANSWER: a

POINTS: 1

3. Consider the reaction 2H2 + O2 → 2H2O

What is the ratio of the initial rate of the appearance of water to the initial rate of disappearance of oxygen?

a. 1 : 1

b. 2 : 1

c. 1 : 2

d. 2 : 2

e. 3 : 2

ANSWER: b

POINTS: 1

4. Consider the reaction: 4NH3 + 7O2 → 4NO2 + 6H2O

At a certain instant the initial rate of disappearance of the oxygen gas is X. What is the value of the appearance of water at the same instant?

a. 1.2 X

b. 1.1 X

c. 0.86 X

d. 0.58 X

e. cannot be determined from the data

ANSWER: c

POINTS: 1

5. Consider the reaction X → Y + Z

Which of the following is a possible rate law?

a. Rate = k[X]

b. Rate = k[Y]

c. Rate = k[Y][Z]

d. Rate = k[X][Y]

e. Rate = k[Z]

ANSWER: a

POINTS: 1

6. A general reaction written as A + 2B → C + 2D is studied and yields the following data:

[A]0 [B]0 Initial Δ[C]/Δt

0.150 M 0.150 M 8.00 × 10–3 mol/L·s

0.150 M 0.300 M 1.60 × 10–2 mol/L·s

0.300 M 0.150 M 3.20 × 10–2 mol/L·s

What is the overall order of the reaction?

Reference: Ref 12-1

a. 0

b. 1

c. 2

d. 3

e. 4

ANSWER: d

POINTS: 1

7. A general reaction written as A + 2B → C + 2D is studied and yields the following data:

[A]0 [B]0 Initial Δ[C]/Δt

0.150 M 0.150 M 8.00 × 10–3 mol/L·s

0.150 M 0.300 M 1.60 × 10–2 mol/L·s

0.300 M 0.150 M 3.20 × 10–2 mol/L·s

What is the order of the reaction with respect to B?

Reference: Ref 12-1

a. 0

b. 1

c. 2

d. 3

e. 4

ANSWER: b

POINTS: 1

8. A general reaction written as A + 2B → C + 2D is studied and yields the following data:

[A]0 [B]0 Initial Δ[C]/Δt

0.150 M 0.150 M 8.00 × 10–3 mol/L·s

0.150 M 0.300 M 1.60 × 10–2 mol/L·s

0.300 M 0.150 M 3.20 × 10–2 mol/L·s

What is the order of the reaction with respect to A?

Reference: Ref 12-1

a. 0

b. 1

c. 2

d. 3

e. 4

ANSWER: c

POINTS: 1

9. A general reaction written as A + 2B → C + 2D is studied and yields the following data:

[A]0 [B]0 Initial Δ[C]/Δt

0.150 M 0.150 M 8.00 × 10–3 mol/L·s

0.150 M 0.300 M 1.60 × 10–2 mol/L·s

0.300 M 0.150 M 3.20 × 10–2 mol/L·s

What is the numerical value of the rate constant?

Reference: Ref 12-1

a. 0.053

b. 1.19

c. 2.37

d. 5.63

e. none of these (A-D)

ANSWER: c

POINTS: 1

10. A general reaction written as A + 2B → C + 2D is studied and yields the following data:

[A]0 [B]0 Initial Δ[C]/Δt

0.150 M 0.150 M 8.00 × 10–3 mol/L·s

0.150 M 0.300 M 1.60 × 10–2 mol/L·s

0.300 M 0.150 M 3.20 × 10–2 mol/L·s

Determine the initial rate of B consumption (Δ[B]/Δt) for the first trial?

Reference: Ref 12-1

a. 8.00 × 10–3 mol/L·s

b. 1.60 × 10–2 mol/L·s

c. 3.20 × 10–2 mol/L·s

d. 4.00 × 10–3 mol/L·s

e. none of these (A-D)

ANSWER: b

POINTS: 1

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