Two different compounds both contain Element X and Element Y.  Compound I has 1.000 g Element X and 0.2518 g of Element Y.   Compound II has 0.2500 g of Element X and 0.0839 g of Element Y.  Both compounds have the same numbers of atoms of Element X.  Determine the relative numbers of atoms of Element Y in Compound II vs Compound I using integers.  State the name of the law used for these calculations.

Question

 Two different compounds both contain Element X and Element Y.  Compound I has 1.000 g Element X and 0.2518 g of Element Y.   Compound II has 0.2500 g of Element X and 0.0839 g of Element Y.  Both compounds have the same numbers of atoms of Element X.  Determine the relative numbers of atoms of Element Y in Compound II vs Compound I using integers.  State the name of the law used for these calculations.

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