Question

Students X and Y, both prepared an oxide of copper by combining copper and oxygen in the ratios of 4:1 and 8:2, respectively. Do their results justify the Law of Constant Proportions? Explain.

Answer 1

Yes. The ratio 8:2 simplifies to 4:1, so both students combined copper and oxygen in the same fixed mass ratio. Their results therefore satisfy the Law of Constant Proportions.