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    michael1125's Avatar
    michael1125 Posts: 1, Reputation: 1
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    #1

    Mar 1, 2008, 02:19 PM
    How many grams are in 5.66 mol of CaCO3?
    How many grams are in 5.66 mol of CaCO3?
    mrm574's Avatar
    mrm574 Posts: 6, Reputation: 2
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    #2

    Mar 6, 2008, 07:44 PM
    The formula is

    Number of moles = [Mass of sample (g)] / [Relative molecular mass (g/mol)]

    The RMM of calcium carbonate is 100 g/mol.

    The mass is therefore 100 (g/mol) * 5.66 (mol) = 566g.
    RieLLeZ's Avatar
    RieLLeZ Posts: 2, Reputation: 1
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    #3

    Dec 1, 2010, 05:21 PM
    You should know the mass of CaCo3 and that will be 217 g.
    So when you convert it it would be:


    In 1 mole=217g
    And we have 5.66 mol so far

    You have to do is 217 times 5.66 you get=1228.22
    Since we started by three significant figures your answer would be in whole number and that would be 1228 mol.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Dec 1, 2010, 11:01 PM
    Quote Originally Posted by RieLLeZ View Post
    You should know the mass of CaCo3 and that will be 217 g.
    So when you convert it it would be:


    In 1 mole=217g
    And we have 5.66 mol so far

    You have to do is 217 times 5.66 you get=1228.22
    Since we started by three significant figures your answer would be in whole number and that would be 1228 mol.
    This is totally wrong.

    1 mol of (NOT CaCo3) has a mass of 100 g, NOT 217 g

    5.66 mol of CaCO3 will have a mass of 566 g

    NOT 1228.22 mol, which isn't even a mass. This is just plain wrong, you start with 5.66 mol and end up with 1228.22 mol?

    Plus this thread was revived. THREAD CLOSED
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