2NO(g) + Cl2(g) --> 2NOCl(g)

If the reaction is second order with reapect to NO and first order with respect to Cl2,

a.write rate equation
b. What is the order of chemical reaction?

a.

rate = k(NO)^2(Cl2)
b.
The order of the equation is 2+1 = 3

a. The rate = k[NO]^2[Cl2]

the overall order of the rxn is 2+1=3

a. The rate equation for the given reaction can be written as: Rate = k[NO]^2[Cl2]

b. The order of the chemical reaction can be determined by adding the exponents of the reactant concentrations in the rate equation. In this case, the sum of the exponents is 2 + 1, which equals 3. Therefore, the order of the chemical reaction is 3.

To determine the rate equation and the order of the chemical reaction, we need to use the given information.

a. Writing the rate equation:
The rate equation expresses how the concentration of reactants affects the rate of reaction. In this case, we know that the reaction is second order with respect to NO and first order with respect to Cl2.

The general form of the rate equation is:
Rate = k[A]^x[B]^y

Where:
Rate is the rate of reaction,
k is the rate constant,
[A] and [B] are the concentrations of reactants, and
x and y are the orders of the reaction with respect to A and B, respectively.

For our reaction, we can write the rate equation as follows:
Rate = k[NO]^2[Cl2]^1

b. Determining the order of the chemical reaction:
The order of the chemical reaction is the sum of the exponents in the rate equation. From the rate equation we derived in part (a), we can see that the order of the reaction is 2 + 1 = 3.

Therefore, the answers are:
a. The rate equation is Rate = k[NO]^2[Cl2]^1.
b. The order of the reaction is 3.