Write the balanced chemical equations for the following reactions: [list of reactions]

here are the balanced chemical equations for the reactions:

1. Aluminium metal reacts with iron (II) oxide powder to produce aluminium oxide and iron metal.

   $$2\text{Al(s)} + 3\text{FeO(s)} \rightarrow \text{Al}_2\text{O}_3\text{(s)} + 3\text{Fe(s)}$$

2. Ammonia gas reacts with Oxygen gas to produce nitrogen (II) oxide gas and water vapour.

   $$4\text{NH}_3\text{(g)} + 5\text{O}_2\text{(g)} \rightarrow 4\text{NO(g)} + 6\text{H}_2\text{O(g)}$$

3. Aqueous iron (II) chloride and sodium carbonate solution react to produce aqueous sodium chloride and a precipitate of iron (II) carbonate.

   $$\text{FeCl}_2\text{(aq)} + \text{Na}_2\text{CO}_3\text{(aq)} \rightarrow 2\text{NaCl(aq)} + \text{FeCO}_3\text{(s)}$$

4. Magnesium carbonate solid and aqueous hydrochloric acid react to produce magnesium chloride solution, water and carbon (IV) oxide gas.

   $$\text{MgCO}_3\text{(s)} + 2\text{HCl(aq)} \rightarrow \text{MgCl}_2\text{(aq)} + \text{H}_2\text{O(l)} + \text{CO}_2\text{(g)}$$