Question

question 1 of 32
hydrogen and oxygen react to form water. which statement best describes
the reactants and product at equilibrium?

a. the concentration of oxygen and hydrogen are zero.

b. the concentrations of water, oxygen, and hydrogen are stable.

c. the concentration of water is the same as for oxygen and
hydrogen.

d. the reaction between oxygen and hydrogen stops.

Explanation:

To solve this, we recall the concept of chemical equilibrium. At equilibrium, the forward and reverse reaction rates are equal, so the concentrations of reactants (hydrogen, oxygen) and product (water) remain stable (constant), but the reaction doesn't stop (eliminating D). Reactants don't have zero concentration (eliminating A), and concentrations of reactants and product don't have to be equal (eliminating C). So B is correct as concentrations stabilize at equilibrium.

Answer:

B. The concentrations of water, oxygen, and hydrogen are stable.