Question

Complete and balance the reaction

$\mathrm{Cu}+{\mathrm{O}}_2\to \underset{\mathrm{Black}}{\mathrm{\_\_\_\_\_}}$

Answer 1

$2\mathrm{Cu}+{\mathrm{O}}_2\to \underset{\mathrm{Black}}{2\mathrm{CuO}}$

Copper is reacting with Oxygen to give Copper oxide which is black in colour.

Balancing-

• We multiply the reactants and products in order to make the number of atoms in reactants and products are same.
• Balancing chemical equation follows the law of conservation of mass.