A first order reaction is `15%` compelte in 20 minutes. How long it take to be `60%` complete?

A first order reaction is 15% complete in 20 minutes. How long will it take to be 60% complete.

A first order reaction is 15% complete in 20 minutes. How long will it take to complete 60%?

A first order reaction is 15% complete in 20 minutes. How long will it take to complete 20%.

A first order reaction is 15% complete in 20 minutes. How long will it take to complete 60% ? (log 1.1766 = 0.0705. log 2.6 = 0.3979).

A first order reaction is 15 % complete in 20 minutes. How long will it takes to complete 20 %.

A first order reaction is 40%. Complete in 50 minute. How long will it take to 80% complete.

A first order reaction is 25% completing 30 minutes. How long will it take for its 75% completion ?