Answer is:<span> Z:X = 7:1 and </span><span>Y:X = 11:1.
</span>Law of multiple proportions or Dalton's Law said that <span>the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small whole numbers.
In this example ratios are whole numbers, </span><span>A:Z = 2.5 : 1 and A:Z = 2.2 : 1 are not whole number ratios.</span><span>
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The idea that atoms are unstable would have been strengthened because the orbiting electron would lose energy and fall into the nucleus.
First, you have to convert mass to moles by making use of molecular weights [N = 14 g/mol and O = 16 g/mol)
A.
5.6/14 = 0.4 mol N
3.2/16 = 0.2 mol O
mol ratio = 2 mol N/1 mol O => N2O
B.
3.5/14 = 0.25 mol N
8.0/16 = 0.5 mol O
mol ratio = 1 mol N/2 mol O => NO2
C.
1.4/14 = 0.1 mol N
4.0/16 = 0.25 mol O
mol ratio = 2 mol N/5 mol O => N2O5
