Question

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

Answer 1

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.