Concentration Changes Over Time

AP Chemistry· difficulty 3/5

For a second-order reaction with k=0.05 M⁻¹\cdots⁻¹ and [A]₀=0.40 M, t₁/₂ is

A
$5 s$
B
$100 s$
C
$50 s$
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D
$10 s$

Explanation

t₁/₂ = 1/(k[A]₀) = 1/(0.05\cdot0.40) = 50 s.

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