Question

A 0.24 g sample of compounds 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
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Answer 1

Answer:

total mass of compounds-0.24 g

mass of boron in it=0.096g

therefore% composition by weight of boron =(Mass of boron/Total mass of compounds)*100

=(0.096/0.24)*100

=40%

mass of oxygen in the compound

=(0.144/0.24)*100

=60%

the compound is made up only boron and oxygen, therefore the %Composition of the components sum t 100%(60%+40%)

Explanation:

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