Ch. 19 - Finding Compositions in Compounds

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Chemistry

Last updated 1:30 PM on 5/13/24
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Why do scientists calculate the percent composition by mass?

To find the purity of a compound or the amount of all the different elements

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What is the empirical formula used for?

To determine the proportions of an element in a compound

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What is the percent composition of a compound?

The percent by mass of each element in that compound

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What is the formula for the percent composition of an element?

100 (n * molar mass of element / molar mass of compound)

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