Chemistry An Atoms First Approach 2nd Edition By Steven S. Zumdahl – Test Bank

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