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A sample of a compound has a total mass of 200.0 g. Phosphorus comprises87.28 g of the sample while oxygen comprises 112.72 g.a. Find the percent mass of phosphorus and oxygen in the sample.

User Snakespan
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1 Answer

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To find the mass percent composition of an element, divide the mass contribution of the element by the total mass then multiply by 100.

The total mass = 200.0 g

Phosphorus mass = 87.28 g

Oxygen mass = 112.72 g

%composition of P:

=> (87.28 g/200.0g)*100

=> 43.64 %

%composition of O:

=> (112.72g/200.0 g)*100

=> 56.36 %

User Shakema
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