Question

what is the mathematical formula for computing mass percent composition from a chemical formula?

mass % of element x = \\( \frac{mass of one mole of the compound}{mass of x in one mole of compound} \times 100\\% \\)

mass % of element x = \\( \frac{mass of x in one mole of compound}{mass of one mole of the compound} \\)

mass % of element x = \\( \frac{mass of one mole of the compound - mass of x in one mole of compound}{mass of one mole of the compound} \times 100\\% \\)

mass % of element x = \\( \frac{mass of x in one mole of compound}{mass of one mole of the compound} \times 100\\% \\)

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Explanation:

Mass percent composition is calculated by taking the mass of the element in one mole of the compound, dividing it by the mass of one mole of the entire compound, and then multiplying by 100% to get a percentage.

Answer:

mass % of element \( X=\frac{\text{mass of }X\text{ in one mole of compound}}{\text{mass of one mole of the compound}}\times100\% \)