The rate constant for the reaction, - 4 + , is 3.0 × 10^-5 s^-1. If the rate of reaction is 2.4 × 10^-5 mol litre^-1 s^-1, then the concentration of (in mole litre^-1) is

Question

The rate constant for the reaction, $N_2O_5$ -> 4$NO_2$ + $O_2$, is 3.0 × 10^-5 s^-1. If the rate of reaction is 2.4 × 10^-5 mol litre^-1 s^-1, then the concentration of $N_2O_5$ (in mole litre^-1) is

Prashant Kotian · Accepted Answer

Correct answer: D. The unit of rate constant (s^-1) indicates that the reaction is first-order. Rate = K [] => 2.4 × 10^-5 = (3.0 × 10^-5) * [] => [] = 2.4 × 10^-5 / (3.0 × 10^-5) = 0.8 mol/L.

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