A first order reaction is `50%` completed in `1.26 xx 10^(14)`s. How much time would it take for `100%` completion?

A first order reaction is 50% completed in 1.26xx10^(14)s. How much time would it take for 100% completion-

A first order reaction is 50% completed in 1.26 xx 10^14 s. How much time would it takefor 100% completion?

A first order reactions 50% completed in 1.26xx10^4 sec. How much time would take for 100% completion.

A first order reaction is 75% completed in 72 min. How long time will it take for (i) 50% completion (ii) 87.5% completion

A first order reaction taken 45.4 minutes for 50% completion. How much time will it take for 60% completion ?