Write down the balanced equation that determines each of the following reactions:
1. Pure indium metal reacts with oxygen gas to produces the solid indium (III) oxide.
2. The fermentation of fruit juice to produce wine involves the conversions of glucose (C6H12O6) to carbon dioxide and ethanol (C2H6O).
3. Potassium metal reacts with water to form the aqueous hydrogen gas and potassium hydroxide.