Write and balance the chemical equation of the given chemical reaction. 1. Magnesium (Mg) reacts rapidly and dramatically when ignited, combining with oxygen gas (O2) from the air to produce a fine powder of magnesium oxide (MgO). 2. Sodium hydroxide (NaOH) decomposes on heating to yield sodium oxides (Na2O) and water (H2O). 3. Zinc (Zn) reacts with hydrochloric acid (HCl)to produce aqueous zinc chloride (ZnCl2) and hydrogen gas (H2). 4. Iron (Fe) combines with oxygen gas (O2) to form Ferric oxide (Fe2O3). 5. Carbon dioxide (CO2) reacts with water (H2O) to form carbonic acid (H2CO3).

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1. Magnesium (Mg) reacts rapidly and dramatically when ignited, combining with oxygen gas (O2) from the air to produce a fine powder of magnesium oxide (MgO).

unbalanced : Mg + O2 = MgO

balanced : 2Mg + O2 = 2MgO

2. Sodium hydroxide (NaOH) decomposes on heating to yield sodium oxides (Na2O) and water (H2O).

unbalanced : NaOH = Na2O + H2O

balanced : 2NaOH = Na2O + H2O

3. Zinc (Zn) reacts with hydrochloric acid (HCl)to produce aqueous zinc chloride (ZnCl2) and hydrogen gas (H2).

unbalanced : Zn + HCl = ZnCl2 + H2

balanced : Zn + 2HCl = ZnCl2 + H2

4. Iron (Fe) combines with oxygen gas (O2) to form Ferric oxide (Fe2O3).

unbalanced : Fe + O2 = Fe2O3

balanced : 4Fe + 3O2 = 2Fe2O3

5. Carbon dioxide (CO2) reacts with water (H2O) to form carbonic acid (H2CO3).

unbalanced : CO2 + H2O = H2CO3

balanced : CO2 + H2O = H2CO3