answer to electrical current passing through H2SO4 State and explain the change in mass that occur when following substances are separately heated in open crucibles [4 mks]

Question

State and explain the change in mass that occur when following substances are separately heated in open crucibles 

1. Copper metal
2. Copper II nitrate

Answer 1

1. Mass increase-Copper metals combines with oxygen forming copper oxide
2. Mass reduction-Copper II Nitrate is decomposed by heat forming copper oxide, Nitrogen IV Oxide and oxygen gases, the gases escape.