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    Barney33's Avatar
    Barney33 Posts: 1, Reputation: 1
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    #1

    Apr 21, 2009, 12:18 PM
    Mole solutions
    How many moles of HCl are present in 75.0mL of a 0.200M solution?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Apr 21, 2009, 12:28 PM

    The concentration is 0.200 M which is 0.200 moles/Liter.

    You have 75 mL. How many liters is this?

    If you multiply Moles/Liter times Liters you'll get:



    The two "liter"s cancel out and you're lift with "moles"

    So, figure out how many Liters you have if you have 75 milliliters and multiply that value times the concentration in moles per liter.
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