1.what effect would adding water (h2o) have on this reaction over time?

(nh4)2co3(s) ⇌ 2nh3(g) +co2(g) +h2o(g)

a.
the concentration of products would increase, and the concentration of reactants would decrease.
b.
the concentrations of both products and reactants would increase.
c.
the concentration of products would decrease, and the concentration of reactants would increase.
d.
the concentrations of both products and reactants would decrease.

2.which statement is true of a catalyst?

a.
it behaves as a reactant in a chemical reaction.
b.
it increases the temperature of a reaction.
c.
it decreases the concentration of the products.
d.
it accelerates the reaction rates of a mixture.

3.which statement is always true about a reversible chemical reaction?

a.
the concentration of reactants is higher than that of the products.
b.
the products can form reactants, and the reactants can form products.
c.
the concentrations of reactants and products are not constant.
d.
the concentration of the products is higher than that of the reactants.

4.classify the outcomes based on whether they are caused by adding or removing a reactant from a chemical reaction.

-the rate of the forward
reaction increases.

-the rate of the reverse
reaction increases.

-the concentration of
products increases.

-the concentration of
products decreases.