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Mass percent composition

Posted: Thu Oct 11, 2018 8:33 pm
by chrisdinkel_4E
Is mass percent composition simply the percent of each atom in a molecule based on the molar mass of each atom?

Re: Mass percent composition

Posted: Thu Oct 11, 2018 8:36 pm
by Michelle Wang 4I
Yeah, mass percent composition is the percent of how much one element makes up a molecule by weight. For example in H2O, hydrogen makes up about 11% of the molecule.

Re: Mass percent composition

Posted: Thu Oct 11, 2018 8:44 pm
by MaiaRodriguezChoi3E
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%

Re: Mass percent composition

Posted: Thu Oct 11, 2018 10:02 pm
by Vicky Lu 1L
Mass percent composition is the proportion of an element of that whole molecule. It would be the mass of that element divided by the entire molar mass of a compound.

Re: Mass percent composition  [ENDORSED]

Posted: Thu Oct 11, 2018 10:39 pm
by Chase Yonamine 1J
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%.