Question

Balance the following chemical reactions:
Mno2+Hcl=MnCl2+H2O+Cl2
C2H4+O2=CO2+H2O

Answer 1

Mno2+4Hcl=Mncl2+2H2o+cl2
C2H4+3o2=2Co2+2H20
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Answer 2

Explanation:

Balance chemical equation is an equation in which number of atoms of individual element are present in same number on both sides that is reactant side and product side.

$MnO_2+4HCl\rightarrow MnCl_2+2H_2O+Cl_2$

By stiochiometery, 1 moles of  manganese dioxide reacts with 4 mol of hydrochloric acid to give 1 mol manganese chloride and 2 mol of water and 1 mol of chloride.

$C_2H_4+3O_2\rightarrow 2CO_2+2H_2O$

By stiochiometery, 1 moles of ethene reacts with 3 mol of oxygen to give 2 mol carbon dioxide and 2 mol of water.