What is the differential rate expression of the change in B with time? Incorporate elements that describe both its formation and reaction!

The differential rate expression for the rate of change in the concentration of B with time is

-rB = dCB/dt = kCB^n

where k is the rate constant and

n is the order of the reaction

This is assuming that the rate is only affected by the concentration of B and the order of the reaction is in the nth order.