Math Quiz Submissions - Lesson 2 Quiz All SOLUTIONS GRADED

2/23/202
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Quiz Submissions - Lesson 2 Quiz
Attempt 1
Written: Dec 29, 2020 2:06 AM - Dec 29, 2020 2:50 AM
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Released: Jan 8, 2021 11:55 PM

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Question 1 0/5
points
A reaction was experimentally determined to follow the rate law, Rate = k[A]2
where k = 0.456 s-1M-1. Starting with [A]o = 0.500 M, how many seconds will it take
for [A]t = 0.250 M?

2.85 x 10-2 s



5.48 x 10-1 s


1.52 s


4.39 s


1.14 x 10-1 s



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Question 2 5/5
points
The elementary steps for the catalyzed decomposition of dinitrogen monoxide are
shown below.

N2O(g) + NO(g) → N2(g) +

NO2(g) NO2(g) → NO(g) +

1/2 O2(g)

Which of the following statements is/are CORRECT?

1) The overall balanced reaction is N2O(g) → N2(g) + 1/2 O2(g).

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2) NO2(g) is a catalyst for the reaction.

3) NO(g) is a reaction intermediate.


2 only


1 and 3

1 only



1, 2, and 3


3 only


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Question 3 5/5
points
The decomposition of ozone may occur through the two-step

mechanism shown: Step 1: O3 → O2 + O

Step 2: O3 + O → 2O2

The oxygen atom is considered to be a(n):


catalyst


activated complex

reactant


product

reaction intermediate



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Question 4 5/5
points