Which equation is an expression of the rate law?

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

k= rate constant

m = order with respect to A

n =  order with respect to B

Total order = m+n

is ideal gas equation

is vant hoff equation.

is equilibrium constant.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.