At a particular temperature, N₂O₅ decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N₂O₅ is 1.0 *10¹⁶ molecules/cm³, what will be the concentration in molecules/cm³ after 10.0 s?

Question

Quizplus · Accepted Answer

For a first-order reaction, the concentration after time t can be calculated using the formula: [A] = [A]₀ * (1/2)^(t/t₁/₂). Here, t = 10 s and t₁/₂ = 3 s. After 10 s, the concentration is approximately 9.9 x 10^14 molecules/cm³.

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