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Atoms and Molecules
Q.1: A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.
The percentage composition of an element can be expressed as:
According to the question, 0.24g of compound contains 0.096g of boron and 0.144g of oxygen. So, the compound contains only boron and oxygen atom.
So, the percentage composition of boron in 0.24g of compound is calculated as shown below:
Therefore, the percentage composition of boron in the given compound is 40 %.
Similarly, the percentage composition of oxygen in 0.24g of compound is calculated as shown below:
Therefore, the percentage composition of oxygen in the given compound is 60 %.
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