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In an experiment, 2.4 g of iron oxide on...

In an experiment, 2.4 g of iron oxide on reduction with hydrogen yield 1.68 g of iron. In another experiment. 2.9 g of iron oxide give 2.03 g of iron on reduction with hydrogen show that the above data illustrate the law of constant proportions.

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In the first experiment
The mass of iron oxide =2.4g
The mass of iron after reduction =1.68g
The mass of oxygen =Mass of iron oxide-Mass of iron
`=(2.4-1.68)=0.72g`
Ratio of oxygen and iron `=0.72:1.68=1:2.33`
In the second experiment
The mass of iron oxide =2.9g
The mass of iron after reduction =2.03 g
The mass of oxygen `=(2.9-2.03)=0.87g`
Ratio of oxygen and iron =`0.87:2.03=1:2.33`
Thus, the data illustrate the law of constant proportions, as in both the experiments the ratio of oxygen and iron is the same.
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