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    Molecular mass and moles

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    First, how many moles are present in each of the following masses? 2.58g of SrSO4 and 2.53 x10-3g of Ag2CO3.

    Second, going in reverse, How many grams are necessary to obtain the given number of moles? 3.20 x 10-4 moles of NaOH and 6.42 moles of AgNO3.

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    Solution Preview

    Please see the attached file.

    Before you look at the solution, let me suggest that you check out the following sites:

    http://chem.sci.gu.edu.au/help_desk/The_Mole.htm
    http://www.digitalfire.ab.ca/cermat/education/111.html

    For some nice explanations about conversion between mass and moles.

    The following site is an incredibly nice site with a lot of chemical data:
    http://www.webelements.com/

    then you might want to solve the questions by yourself and check it against my solution.
    If you get stuck, you can always look at the solution.

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    The atomic weight of each element actually tells us how many grams one mole of the element weighs. Or in other words, how many grams do 6.0231023 atoms of the element weigh.

    For example, Arsenic's atomic weight is 74.92
    This ...

    Solution Summary

    The solution describes the concept of mole in chemistry and shows simple mass-to-mole conversion procedure.

    $2.49

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