Mass percent composition  [ENDORSED]

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chrisdinkel_4E
Posts: 33
Joined: Thu Sep 27, 2018 11:17 pm

Mass percent composition

Postby chrisdinkel_4E » Thu Oct 11, 2018 7:33 pm

Is mass percent composition simply the percent of each atom in a molecule based on the molar mass of each atom?

Michelle Wang 4I
Posts: 47
Joined: Thu Sep 27, 2018 11:27 pm

Re: Mass percent composition

Postby Michelle Wang 4I » Thu Oct 11, 2018 7:36 pm

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.

MaiaRodriguezChoi3E
Posts: 32
Joined: Thu Sep 27, 2018 11:25 pm

Re: Mass percent composition

Postby MaiaRodriguezChoi3E » Thu Oct 11, 2018 7:44 pm

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%

Vicky Lu 1L
Posts: 51
Joined: Thu Sep 27, 2018 11:18 pm

Re: Mass percent composition

Postby Vicky Lu 1L » Thu Oct 11, 2018 9:02 pm

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.

Chase Yonamine 1J
Posts: 49
Joined: Thu Sep 27, 2018 11:17 pm

Re: Mass percent composition  [ENDORSED]

Postby Chase Yonamine 1J » Thu Oct 11, 2018 9:39 pm

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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