For the reaction A+B+C→D+E, the initial reaction rate was measured
for various initial concentrations of reactants. The following data
were collected:

Part A What is the reaction order with respect to A? Part B What is the reaction order with respect to B? Part C What is the reaction order with respect to C? 
rate= k [A]^{x} [B]^{y} [C]^{z}
from data table
3.0 x 10^5 =k [0.1]^{x} [0.1]^{y} [0.1]^{z} >(1)
9.0 x 10^5 =k [0.1]^{x} [0.1]^{y} [0.3]^{z} >(2)
1.2 x 10^4 =k [0.2]^{x} [0.1]^{y} [0.1]^{z} >(3)
1.2 x 10^4 =k [0.2]^{x} [0.2]^{y} [0.1]^{z} >(4)
by solving 1 & 2 , we get
z = 1
by solving 1 & 3 , we get
x = 2
by solving 3 & 4 , we get
y = 0.
rate= k [A]^{2} [B]^{0} [C]^{1}
reaction order with respect to A = 2
reaction order with respect to B = 0
reaction order with respect to C = 1
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