25% of a first order reaction is completed in 30 min . Find the time required for completion of 50% of the reaction.

75% of a first order reaction is completed in 30 min. What ts the time required for 93.75% completion of the reaction (in minutes) ?

A first order reaction is 25% complete in 30 minutes. Calculate the time required for 3/4 completion of the reaction.

A First order reaction is 50% complete in 69.3 minutes. Time required for 90% completion for the same reaction is

A first order reaction is 50% complete in 69.3 minutes. Calculate the time for 80% completion of the reaction.

Time required for 50% completion of the first order reaction in one hr. What is the time required for 99% completion of the same reaction ?

Time required for 50% completion of the first order reaction in one hr. What is the time required for 99% completion of the same reaction ?