Question

The initial concentration of R in the reaction \[\ce{R -> P}\] is 4.62 × 10^-2 mol/L. What is the half life for the reaction if k = 2.31 × 10^-2 mol L^-1 s^-1?

Options

• 30 s

• 3 s

• 1 s

• 10 s

Answer 1

1 s

Explanation:

\[\ce{R -> P}\]

[A]₀ = [R]₀ = 4.62 × 10^-2 mol/L

k = 2.31 × 10^-2 mol L^-1 s^-1

`t_(1/2) = [R]_0/(2k)`

= `(4.62 xx 10^-2)/(2 xx 2.31 xx 10^-2)`

= 1 s