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    10dcompton's Avatar
    10dcompton Posts: 1, Reputation: 1
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    #1

    Mar 10, 2009, 12:58 PM
    Chemistry formulas
    What is the formula for converting grams to moles? And moles to grams?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Mar 10, 2009, 02:24 PM

    Note this:

    Moles x Grams/Mole = Grams

    Grams * Moles/Grams = Moles

    ---------------------------------

    Grams/Mole is the molecular weight (or atomic weight if it's an atom) of the substance.

    Moles/Gram is the reciprocal of Grams/Mole.
    Raysmommy's Avatar
    Raysmommy Posts: 3, Reputation: 3
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    #3

    Mar 11, 2009, 12:55 PM
    Quote Originally Posted by 10dcompton View Post
    what is the formula for converting grams to moles? and moles to grams?
    To go from grams to moles you divide by the molar mass (atomic mass if its an element, formula mass for ionic compound, etc.)

    To go from moles to grams you multiply by the molar mass.
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