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Yes, mass percentage composition is simply the percentage of the mass of a certain element in a compound. So you take the mass of the element divided by the molar mass of the entire compound and times 100%
Mass percent composition is the concentration (mass) of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%. For example, to find the mass percent of Carbon in glucose (C6H12O67) you would take the mass of 6 carbon which is about 72.06g and divide it by the total mass of glucose which is 180.16. The quotient is 0.3999 which should be multiplied by 100% to get the final answer which is 39.99%.
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