Question

Two answer multiple choice-- please help!

Answer 1

Answer:

Rate = K[NH₄⁺][NO₂⁻]

Explanation:

In kinetics studies of reaction, rate law is a mathematical expression that relates speed of reaction with concentrations of the reactants. For a reaction:

aA + nN → cC + dD

The rate law is expressed in terms of [A] and [B] as follows:

Rate = K[A]ᵃ[N]ⁿ

Where K is rate constant.

For the reaction:

NH4+ + NO2– ⟶ N2 + 2H2O

The rate law is:

Rate = K[NH₄⁺][NO₂⁻]

As was said in the problem, the rate is porportional to [NH₄⁺] and to [NO₂⁻]