Question

5g of Cu is used to make copper (II) oxide. How much oxygen is required for the reaction?

Answer 1

Answer:

Amount of oxygen for Cu₂O = 1.259 gram (Approx)

Explanation:

Given:

Amount of Cu = 5 g

Find:

Amount of oxygen for Cu₂O

Computation:

Molar mass of Cu = 63.54 g/mol

Molar mass of Cu = 32 g/mol

Molar mass of Cu₂O = 79.54 g/mol

Amount of oxygen for Cu₂O = 5[32/127.08]

Amount of oxygen for Cu₂O = 1.259 gram (Approx)