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At a Particular Temperature, N2O5 Decomposes According to a First-Order

Question 58

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At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 10.0 s?


A) 6.3 × 103
B) 9.9 × 1014
C) 9.4 × 102
D) 7.3 × 109
E) 1.8 × 1012

Correct Answer:

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