The elementary chemical reaction
O + ClO → Cl + O2
is made pseudo-first order in oxygen atoms by using a large excess of ClO radicals. The rate constant for the reaction is 3.5 × 10-11 cm3/molecule • s. If the initial concentration of ClO is 1.0 × 1011 molecules/cm3, how long will it take for the oxygen atoms to decrease to 10.% of their initial concentration?
A) 3.2 × 10-3 s
B) 0.66 s
C) 0.017 s
D) 23 s
E) 2.4 s
Correct Answer:
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