Balance the following chemical reactions: (1) MNO2 + HCL = MnCl2 + H2O + Cl2 (2) C2H4 + O2= CO2 + H2O

Answer:

The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.

(1) MnO2 + HCl → MnCl2 + H2O + Cl2

The balanced chemical equation is

MnO2 + 4 HCl → MnCl2 + 2H2O + Cl 2

By means of a stoichiometry, 1 mol of manganese dioxide reacts with 4 mol of HCl (hydrochloric acid) to form 1 mol manganese chloride 1 mol of chloride & 2 mol of water.

(2) C2H4 + O2→ CO2 + H2O

The balanced equation is

C2H4 +3O2 → 2CO2 + 2H2O

Via stiochiometery, 1 mol of ethene reacts with 3 mol oxygen to produce to 2 mol of carbon dioxide and 2 mol of water.

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