Problem 41
Sulfuric acid in acid rain forms when gaseous sulfur dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous sulfuric acid. Write a balanced chemical equation for this reaction.
Problem 42
Nitric acid in acid rain forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid. Write a balanced chemical equation for this reaction.
Problem 43
Write a balanced chemical equation for the reaction of solid vanadium(V) oxide with hydrogen gas to form solid vanadium(III) oxide and liquid water.
Problem 44
Write a balanced chemical equation for the reaction of gaseous nitrogen dioxide with hydrogen gas to form gaseous ammonia and liquid water.
Problem 45
Write a balanced chemical equation for the fermentation of sugar \(\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)\) by yeasts in which the aqueous sugar reacts with water to form aqueous ethyl alcohol \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right)\) and carbon dioxide gas.
Problem 47
Balance each chemical equation. (a) \(\mathrm{Na}_{2} \mathrm{~S}(a q)+\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}(a q) \longrightarrow \mathrm{NaNO}_{3}(a q)+\mathrm{CuS}(s)\) (b) \(\mathrm{HCl}(a q)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cl}_{2}(g)\) (c) \(\mathrm{H}_{2}(g)+\mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(l)\) (d) \(\mathrm{FeS}(s)+\mathrm{HCl}(a q) \longrightarrow \mathrm{FeCl}_{2}(a q)+\mathrm{H}_{2} \mathrm{~S}(g)\)
Problem 48
Balance each chemical equation. (a) \(\mathrm{N}_{2} \mathrm{H}_{4}(l) \longrightarrow \mathrm{NH}_{3}(g)+\mathrm{N}_{2}(g)\) (b) \(\mathrm{H}_{2}(g)+\mathrm{N}_{2}(g) \longrightarrow \mathrm{NH}_{3}(g)\) (c) \(\mathrm{Cu}_{2} \mathrm{O}(s)+\mathrm{C}(s) \longrightarrow \mathrm{Cu}(s)+\mathrm{CO}(g)\) (d) \(\mathrm{H}_{2}(g)+\mathrm{Cl}_{2}(g) \longrightarrow \mathrm{HCl}(g)\)
Problem 50
Balance each chemical equation. (a) \(\mathrm{MnO}_{2}(s)+\mathrm{HCl}(a q) \longrightarrow\) \(\mathrm{Cl}_{2}(g)+\mathrm{MnCl}_{2}(a q)+\mathrm{H}_{2} \mathrm{O}(l)\) (b) \(\mathrm{Co}_{2}(g)+\mathrm{CaSiO}_{3}(s)+\mathrm{H}_{2} \mathrm{O}(l) \underset{\mathrm{SiO}_{2}}{\longrightarrow}(s)+\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}(a q)\) (c) \(\mathrm{Fe}(s)+\mathrm{S}(l) \longrightarrow \mathrm{Fe}_{2} \mathrm{~S}_{3}(s)\) (d) \(\mathrm{NO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{HNO}_{3}(a q)+\mathrm{NO}(g)\)
Problem 55
Catalytic converters work to remove nitrogen oxides and carbon monoxide from exhaust. Balance the skeletal equation for one of the reactions that occurs in a catalytic converter. $$ \mathrm{NO}(g)+\mathrm{CO}(g) \longrightarrow \mathrm{N}_{2}(g)+\mathrm{CO}_{2}(g) $$
Problem 56
Billions of pounds of urea are produced annually for use as fertilizer. Balance the skeletal equation for the synthesis of urea. $$ \mathrm{NH}_{3}(g)+\mathrm{CO}_{2}(g) \longrightarrow \mathrm{CO}\left(\mathrm{NH}_{2}\right)_{2}(s)+\mathrm{H}_{2} \mathrm{O}(l) $$
