When copper sulfide is partially roasted in air (reaction with o2), copper sulfite is formed first. subsequently, upon heating, the copper sulfite thermally decomposes to copper oxide and sulfur dioxide. Write balanced chemical equations for these two reactions

The question is incomplete, complete question is:

When copper(I) sulfide is partially roasted in air (reaction with oxygen), copper(I) sulfite is formed first. subsequently, upon heating, the copper sulfite thermally decomposes to copper(I) oxide and sulfur dioxide. Write balanced chemical equations for these two reactions.

The balanced chemical equations for these two reactions:

Explanation:

On  partial roasting of copper sulfide in an air. The balanced chemical reaction is given as:

On further heating of copper(I) sulfite it get decomposes into copper oxide and sulfur dioxide. The balanced chemical reaction is given as:

a polar bond is formed when electrons are shared unevenly between atoms