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

question 59

Multiple Choice

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?

• A) 1.0 * 10¯³ mol L¯¹
• B) 1.0 *10¯⁴ mol L¯¹
• C) 9.6 * 10¯⁵ mol L¯¹
• D) 4.3 * 10¯⁵ mol L¯¹
• E) 9.7 *10¯⁶ mol L¯¹

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