Question

The reported molar mass for the copper oxide formed in experiment 1 is 79.55 g/mol. what is the molecular formula of the oxide formed in experiment 1

Answer 1

Answer:
            CuO

Explanation:
                   As given the molar mass of following Copper Oxide is 79.55 g.mol⁻¹,
                                                 CuₐOₓ

Where "a" and "x" are unknown.

As we know the atomic masses of Cu and O are;

                                      Cu  =  63.55 g.mol⁻¹

                                      O  =  16 g.mol⁻¹

So, it is clear that this oxide is containing only one Copper atom,
So,
                       Molecular Mass  =  79.55
                  
                    -  Copper Mass      =  63.55
                                                    --------------
                                                       16

Hence, 16 g.mol⁻¹ is the mass of one mole of Oxygen atoms, Hence, this oxide contains only one oxygen atom.

Result:
          The molecular formula of given copper oxide is CuO.