A gas-phase decomposition is first-order with respect to the reactant, R. If the initial concentration of R is 1.0 *¯⁴ mol L¯¹ and the rate constant k = 1.08 *10¯⁶ s¯¹, what concentration of R remains after 25 days?

Question

Quizplus · Accepted Answer

For a first-order reaction, the concentration at time t is given by [R] = [R]₀ * e^(-kt). Converting 25 days to seconds and substituting the values, we find the concentration of R after 25 days is approximately 9.7 * 10¯⁶ mol L¯¹.

A Gas-Phase Decomposition Is First-Order with Respect to the Reactant