In a first order reaction, the concentration of reactant decreases from 20 mmol `dm^(-3)` to 8 mmol `dm^(-3)` in 38 minutes. What is the half life of reaction?

In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change form 0.1 M to 0.025 M is :

The concentration of a reactant decreases from 0.2 M to 0.1 M in 10 minutes . The rate of the reaction is ______.

In a first order reaction , the concentration of the reactant is reduced to 12.5% in one hour. When was it half completed ?

The rate constant for a first order reaction is 7.0xx10^(-4) s^(-1) . If initial concentration of reactant is 0.080 M, what is the half life of reaction ?

The order of the reaction for which the units of rate constant are mol dm^(-3) s^(-1) is

The half life of first order reaction is 990 s. If the initial concentration of the reactant is 0.08 mol dm^3 , what concentration would remain after 35 minutes?