[ILoveISO]

Rate law of a reaction is 2A + B --> C is second order in A and first order in B. What happens to the rate when the concs of A and B are halved?

The reaction rate becomes halved?

What are the units for the rate constant for the rate law = k[a][ b][c]

M^-2 sec^-1 ? Is that right?

[Schrödinger]

Rate law of a reaction is 2A + B --> C is second order in A and first order in B. What happens to the rate when the concs of A and B are halved?

The reaction rate becomes halved?

Write down the rate law in terms of rate constant and concentrations of reactants. Then replace each concentration by half the original value.