Multiple Choice
A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 *1020 molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes?
A) 1.00 * 104 molecules
B) 2.00 * 1019 molecules
C) 3.20 *1016 molecules
D) 5.00 * 1020 molecules
E) None of these choices is correct.
Correct Answer:
Verified
Correct Answer:
Verified
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