A first-order reaction with rate constant k = 5.5 × 10⁻¹⁴ s⁻¹ has a half-life of approximately:
A1.26 × 10¹⁴ s
B1.26 × 10¹³ s
C1.26 × 10¹² s
D3.8 × 10¹³ s
Answer & Solution
Correct answer: B. 1.26 × 10¹³ s
t_(1/2) = 0.693/k = 0.693 / (5.5 × 10⁻¹⁴) = **1.26 × 10¹³ s** (~400 000 years).
Related questions
Chemical kinetics studies the rate of a reaction and also its:Manganese dioxide is given as a catalyst for the decomposition of:A catalyst increases the rate of a reaction without itself being:Lowering the activation energy of a reaction makes the rate:Raising the temperature of a reaction makes the rate:The exponential factor gives the fraction of molecules with kinetic energy:Arrhenius was a chemist from:The physical justification of that equation was provided by: