Final answer:
The balanced chemical equation for the reaction between magnesium hydroxide and sulfuric acid is: Mg(OH)2(aq) + H2SO4(aq) → MgSO4(aq) + 2H2O(l). The balanced chemical equation for the reaction between nitrogen gas and hydrogen gas is: N2(g) + 3H2(g) → 2NH3(g).
Step-by-step explanation:
a) Magnesium hydroxide reacts with sulfuric acid:
Mg(OH)2(aq) + H2SO4(aq) → MgSO4(aq) + 2H2O(l)
This balanced equation shows that one molecule of magnesium hydroxide reacts with one molecule of sulfuric acid to form one molecule of magnesium sulfate and two molecules of water.
b) Nitrogen gas combines with hydrogen gas:
N2(g) + 3H2(g) → 2NH3(g)
This balanced equation shows that one molecule of nitrogen gas reacts with three molecules of hydrogen gas to form two molecules of ammonia.