Identify each of the following catalysts as homogeneous or heterogeneous. Consider the reaction of ethylene and hydrogen in the presence of solid nickel, producing ethane:

a. Nickel is a(n) catalyst.
b. Manganese(IV) oxide is a(n) catalyst.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.

hypostyle hall;