The half life of a first order reaction is `60 min`. How long will is take to consume `90%` of the reactant?

Half fife of a first order reaction is 60 min. How long will it take to consume 90% of the reaction’?

The half life of a first order reaction is 6 hours. How long will it take for the concentration of reactant to change from 0.8 M to 0.25 M ?

The half life of a first order reaction is 6 hours. How long will it take for the concentration of reactant to change from 0.8 M to 0.25 M ?

Derive an expression for the relation between half life and rate constant for first order reaction. The half life period for first order reaction is 1.7 hrs. How long will it take for 20% of the reactant to disappear?

The half-life of a first order reaction is 30 min. How long would be required for 25% of the reactant to be decomposed ?