Balance the following equations. Na 2 O + H 2 O → NaOH

If we dissolve sodium oxide in water a base sodium hydroxide is formed. The balanced chemical equation for this reaction can be written as Na 2 O + H 2 O → 2 NaOH In the above reaction the number of particular atoms on the reactant side is equal to the number of particular atoms on the product side. Hence, this equation is balanced according to the law of conservation of mass.

Balance the following equations. CO 2 + C → CO

When carbon dioxide is heated with coke to form a gaseous compound. This compound escapes leaving nothing behind. The balanced chemical equation is given below. CO 2 g + C s → ∆ 2 CO g Chemical equations must be balanced to satisfy the law of conservation of matter.

Balance the following equations. Mg + HNO 3 → Mg NO 3 2 + H 2

Balanced equations mean equal numbers of atoms for each element in the reactants and products. Mg + 2 HNO 3 → Mg NO 3 2 + H 2 . The balanced chemical equation always follows the law of conservation of mass.