Lesson 2 Quiz CHEM 134 WITH CORRECT QUESTIONS AND ANSWERS

Lesson 2 Quiz CHEM 134 WITH
CORRECT QUESTIONS AND
ANSWERS




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, 1. For the reaction below relate the rate of disappearance of
hydrogen to the rate of formation of ammonia.

N2(g) + 3H2(g) ’2NH3(g) :Answer -Δ[H2]/3 Δt = Δ[NH3]/2Δt
2. The elementary steps for the catalyzed decomposition for
dinitrogen monox- ide are shown below. Identify the catalyst.

NO(g) + N2O(g) ’N2(g) + NO2(g)
2NO2(g) ’2NO(g) + O2(g) :Answer NO
3. Ozone in the upper atmosphere is important to life on earth
because it converts harmful UV radiation to heat. How does the
release of CFCs into the atmosphere affect the concentration of
ozone in the upper atmosphere?
a. The Cl in the CFC catalyzes the decomposition of ozone
decreasing its con- centration.
b. The Cl in the CFC catalyzes the production of ozone increasing its
concentra- tion.
c. The NO2 in the CFC catalyzes the decomposition of ozone
decreasing its concentration.
d. The NO2 in the CFC catalyzes the production of ozone increasing
its concen- tration.
e. The CFC's change the ozone into photochemical smog. :Answer a. The Cl
in the CFC catalyzes the decomposition of ozone decreasing its concentration.
4. Determine the overall reaction order for the chemical expression
and rate expression below.

2NO(g) + Cl2(g) ’2NOCl(g)
rate = k[NO]2 × [Cl2] :Answer 3
5. Which of the following factors are likely to affect the rate
of a chemical reaction?
a) The presence of a catalyst
b) The temperature of the reactants
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