Essential Chemistry for IGCSE - Chemical Calculations (Section 2 - No. 27)
Which of the following is a correct expression for calculating the percentage by mass of an element in a compound?
(Mass of element / Molar mass of compound) × 100
(Moles of element / Moles of compound) × 100
(Mass of element / Mass of compound) × 100
(Relative atomic mass of element / Relative molecular mass of compound) × 100
Explanation
The percentage by mass is calculated using (Relative atomic mass of element / Relative molecular mass of compound) × 100.
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