The concentration of a reactant changes from .03M to .02M in 25 minutes. The ave

Question

The concentration of a reactant changes from .03M to .02M in 25 minutes. The average rate of reaction, using time in seconds is

Options:

A . 0.4×10−3mol/l/s

B . 0.024mol/l/s

C . 0.24mol/l/s

D . 6.67×10−6mol/l/s

Answer: Option D
:
D

R a t e = \frac{Δ [R]}{Δ t} = \frac{- (0.02 - 0.03)}{25 \times 60} = 6.67 \times 10^{- 6} m o l / l / s

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