Balance the following chemical reactions: (A) MnO2 + HCl → MnCl2 + H2O + Cl2 (B) C2H4 + O2 → CO2 + H2O

Answer: When the form of substances are represented in a chemical reaction is considered as a chemical equation. Any equation that consists of an equal number of atoms on both sides of the equation is known as a balanced chemical equation.

1.)MnO₂ + HCl → MnCl₂ + H₂O + Cl₂  

1 mol of manganese dioxide tends to react with 4 mol of HCl to introduce 1 mol manganese chloride, 1 mol of chloride as well as 2 mol of water. The balanced equation would be :

MnO₂ + 4 HCl → MnCl₂ + 2H₂O + Cl₂

2.) C₂H₄ + O₂ → CO₂ + H₂O

1 mol of ethene tends to react with 3 mol of oxygen to form 2 mol of carbon dioxide as well as 2 mol of water. The balanced chemical equation would be :

C₂H₄  +3O₂ → 2CO₂ + 2H₂O