• 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.
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