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A 0.24 g sample of compound of oxygen and boron was found by a... - Science
Question
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.
Answer
Mass of compound = 0.24 g
Mass of boron = 0.096 g
Mass of oxygen = 0.144 g
Percentage of boron:
= \frac{\text{Mass of boron}}{\text{Mass of compound}} \times 100= \frac{0.096}{0.24} \times 100= \mathbf{40\%}
Percentage of oxygen:
= \frac{\text{Mass of oxygen}}{\text{Mass of compound}} \times 100= \frac{0.144}{0.24} \times 100= \mathbf{60\%}