Question

If compound A reacts with B following first order kinetics with rate constant 2.011 x 10^-3s^-1 . The time taken by A (in seconds) to reduce from 7 g to 2 g will be ________. (Nearest Integer)

[ log5 = 0.698, log7 = 0.845,log2 = 0.301]

Answer 1

Correct answer is 623