The initial concentration of the reactant in a zero order reaction is `1.386 "mol.L"^(-1)` The half-life of the reaction is 20s. Calculate:
the concentration of the reactant after 30s from the initiation of the reaction.

Explanation

For a zero order reaction , `[A]_(0)-[A]=kt`
For the given reaction `k=0.0346"mol.L"^(-1)s^(-1)`
Given : `[A]_(0)=1.386"mol.L"^(-1)and t = 30 s.`
`therefore[A]=[A]_(0)-kt`
`=1.386"mol.L"^(-1)-(0.0346"mol.L"^(-1).s^(-1)xx30s)`
`=0.348"mol.L"^(-1)`
`therefore` The concentration of the reactant after 30s from the initiation of the reaction is `0.348"mol.L"^(-1)`