Moles in compound

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Moles in compound

Postby Danieljm1B » Wed Jun 26, 2019 6:30 pm

How do you know how many moles there are in a compound if you are given the molecular formula?

Daniel Kim 1D
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Joined: Wed Oct 03, 2018 12:17 am

Re: Moles in compound

Postby Daniel Kim 1D » Wed Jun 26, 2019 7:25 pm

Given the molecular formula, you would find the molar mass, the sum of all the atomic masses. You would then divide the weight that you are given by the molar mass to find out how many moles of that certain compound you have.

Ryan Yee 1J
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Joined: Sat Aug 17, 2019 12:16 am

Re: Moles in compound

Postby Ryan Yee 1J » Wed Oct 02, 2019 6:54 pm

Given the molecular formula, find the atomic weights listed under the element in the periodic table. Multiply the element's weight by the appropriate subscript and then add all the weights together. This will give you the molecular weight of a mole of the molecule, and thus its molar mass. You then divide the given amount of molecule by this newly found molar mass to find the number of moles in the compound.

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