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Balance the following chemical equation and follow the steps involved in balancing a chemical equation. 

Cu2S + O2 → Cu2O + SO2

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Step – 1 : Write the unbalanced equation using correct chemical formula for all substances. 

Cu2S + O2 → Cu2O + SO2 

Step – 2 : Compare number of atoms of each element on both sides.

Atom No. of atoms in LHS No. of atoms in RHS
Cu 2 2
S 1 1
O 2 3

Balancing Cu, S, O atoms both sides 

2Cu2S + 3O2→ 2Cu2O + 2SO2 

The equation is balanced. 

Step – 3 : Write the coefficient of smallest ratio. 

2Cu2S + 3O2 → 2Cu2O + 2SO2 

Step – 4 : Verify above equation for balancing of atoms of each element on both sides. 

2Cu2S + 3O2 → 2Cu2O + 2SO2

 

 

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