Question

What information is needed to calculate the percent composition of a compound

Answer 1

Percent Composition by Mass. Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage.

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Answer 2

The information that is needed to calculate the percent composition of a chemical compound is: the chemical formula of the chemical compound and the atomic mass of its constituent elements.

The percent composition of a chemical compound is simply used to calculate the ratio of an amount of each chemical element to the total amount of elements that are present in the chemical compound, which is then multiplied by 100.

Mathematically, the percent composition of a chemical compound is given by the formula:

$Percent\;composition = \frac{Mass\;of\;solute}{Total\;weight} \times 100$

Deductively, we can conclude that the information that is needed to calculate the percent composition of a chemical compound are:

• The chemical formula of the chemical compound.

• The atomic mass of its constituent elements.

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