For a first order reaction, if the rate constant is 1 min-1 and the reaction time is 2 min, then the ratio of final to initial concentration is ____

For a first order reaction, if the rate constant is 1 min-1 and the re

1.	For a first order reaction, if the rate constant is 1 min-1 and the reaction time is 2 min, then the ratio of final to initial concentration is ____
A.	0.167
B.	0.135
C.	0.198
D.	0.764
Answer» C. 0.198

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