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

    Oct 9, 2011, 06:12 PM
    What is the molecular weight of novocain
    Novacain which contains carbon, hydrogen, nitrogen, and oxygen is 12% nitrogen. If novacain contains two nitrogen atoms per molecule, what is the molecular weight of novocain?
    taxesforaliens's Avatar
    taxesforaliens Posts: 649, Reputation: 117
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    #2

    Oct 9, 2011, 09:11 PM
    Did you try Google?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Oct 11, 2011, 09:01 AM
    12% nitrogen means that 12% of its mass is nitrogen.

    Since you know the atomic mass of a nitrogen atom, you should know how much mass the two atoms of nitrogen have together.

    Then, use proportions:
    12% -> ? g
    100% ->?? g

    That would be the molecular weight of novacain or novocain whatever it's called.
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