Question

If t_(1/2) of first order reaction is 40 min then the time required for the completion of 75% of the reaction will be​

Answer 1

Answer:

t1/2=In2/k=0.4min

for 99.9%, at=1000.1a0=1000a0

kt=Inata0=In1000

(0.4In2.t=3In10

t=1.2×in2In10=4 min