The rate constant of a reaction is `0.69 xx 10^(-1)` and the initial concentration is `0.2 "mol l"^(-1)`. The half-life period is

The rate of a first order reaction is 0.69xx10^(-2) min^(-1) and the initial concentration is 0.5 mol L^(-1) . The half life period is

The rate for the first order reaction is 0.0069 mol L^(-1) min^(-1) and the initial concentration is 0.2 mol L^(-1) . The half life period is

The rate for the first order reaction is 0.69 xx10^-2 mol L^-1 mi n^-1 and the initial concentration is 0.2 mol L^-1 . The half life period is :

The rate for the 1^(st) order reaction is 0.69 xx10^(-2) mol L^(-1) min ^(-1) and the initial concentration is 0.2 mol L^(-1) . The half life period is ____.

The rate for the 1^(st) order reaction is 0.69 xx10^(-2) mol L^(-1) min ^(-1) and the initial concentration is 0.2 mol L^(-1) . The half life period is ____.

The rate for the 1^(st) order reaction is 0.69 xx10^(-2) mol L^(-1) min ^(-1) and the initial concentration is 0.2 mol L^(-1) . The half life period is ____.

The rate constant of a first order reaction is 2.0 xx 10^(-5)s^(-1) and the initial concentration is 0.10 mol L^(-1) . The initial rate is