A certain zero order reaction has `k = 0.025 M s^(-1)` for the disappearance of `A`. What will be the concentration of `A` after `15` seconds if the initial concentration is `0.5 M` ?

Options

A. `0.5 M`
B. `0.32 M`
C. `0.12 M`
D. `0.06 M`

Answer

C

Explanation

`x = k_(1) = 0.025 xx 15 = 0.375 M`
Remaining conc. `= 0.5 - 0.375 = 0.125 M`.