Summary:
- Copper reacts with chlorine to form two compounds.
- The mass ratio of copper per gram of chlorine in the two compounds is 2:1.
- For a given mass of chlorine, compound A contains twice the mass of copper as does compound B.
- For each compound, find the grams of copper that combine with 1.00 g of chlorine.
- For some materials, it turns out that one element can combine with a second element in more than one ratio.
- Carrying out mass ratio calculations helped establish the law of multiple proportions.