<u>Answer:</u> The chemical equations are written below.
<u>Explanation:</u>
Formation reaction is defined as the reaction for the formation of one mole of a substance from its constituent elements.
- <u>For a:</u>
This compound is formed by the combination of calcium, nitrogen and oxygen atoms.
The chemical equation for the formation of calcium nitrate follows:
By Stoichiometry of the reaction:
1 mole of solid calcium reacts with 1 mole of nitrogen gas and 3 moles of oxygen gas to produce 1 mole of solid calcium nitrate.
- <u>For b:</u>
This compound is formed by the combination of carbon, hydrogen and oxygen atoms.
The chemical equation for the formation of methanol follows:
By Stoichiometry of the reaction:
1 mole of solid carbon reacts with 2 moles of hydrogen gas and half moles of oxygen gas to produce 1 mole of liquid methanol.
- <u>For c:</u>
This compound is formed by the combination of sodium, chlorine and oxygen atoms.
The chemical equation for the formation of sodium perchlorate follows:
By Stoichiometry of the reaction:
1 mole of solid sodium reacts with half moles of chlorine gas and 2 moles of oxygen gas to produce 1 mole of solid sodium perchlorate.