Consider the rate law below. R=k (NO2) ^2 what happens to the rate if the concentration is tripled?

The rate increases by a factor of 9.

The rate decreases by a factor of 6.

The rate triples.

The rate doubles.

For this case we have the following equation:

R = k (NO2) ^ 2

if the concentration is tripled, we must rewrite the equation.

We have then:

R ' = k (3 * NO2) ^ 2

R ' = 9 * k (NO2) ^ 2

Rewriting:

R ' = 9 * R

Answer:

The rate increases by a factor of 9.