Question

What are the units of the rate constant, k, for a 1st order reaction if the rate has the units mol*L⁻¹*s⁻¹ and all concentrations are in mol*L⁻¹? (note that the symbol * represents multiplication) 

1. L²*mol⁻²s⁻¹
2. L*mol⁻¹*s⁻¹
3. mol²*L⁻²s⁻¹
4. s⁻¹

Answer 1

Answer: 4) s^-1