Question

a first order reaction is 15% complete in 20 minutes.how long Will it take to complete 60%?​

Answer 1

T=2.303/k*log intial percentage/left over percentage

Explanation:

So from this equation we made two eqations that is

20=2.303/klog100/85....1

t=2.303/k*log100/40....2

Now dividing eqation 1 by 2

20/t=log40/log85

20/t=0.32

=62

Answer 2

Explanation:

hope it helps u

mark my answer brainliest