Anonymous
Anonymous asked in Science & MathematicsChemistry · 10 months ago

 If a cup of your favorite coffee contains 256 mg of caffeine, how many mL of the energy drink will provide the same amount of caffeine? ?

As you are studying for finals, you calculate the concentration of caffeine in an energy drink and discover that it is 0.04529 M in caffeine. The molecular formula of caffeine is C8H10N4O2.

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  • 10 months ago
    Favorite Answer

    (256 x 10^-3 g C8H10N4O2) / (194.1906 g C8H10N4O2/mol) / (0.04529 mol/L) =

    0.0291 L = 29.1 mL

  • Jim
    Lv 7
    10 months ago

    Always start with your "given" and multiply by (1) to convert:

    0.256 C8H10N4O2 * (1mol/194.19 g C8H10N4O2) * (1L/0.04529 mol) =g top and bottom cancel, as does moles, leaving Liters0.0291 L = 29.1 mL

  • Anonymous
    10 months ago

    Only one way to be sure.  Start drinking and keep drinking until you think you're about as hyper as you'd be from your favorite coffee drink. 

  • Dr W
    Lv 7
    10 months ago

    via dimensional analysis

    .. 256mg caffeine... 1 mmol caffeine.....  1 mL energy drink

     ---- ---- ---- ---- --- x ----- ---- ----- ----- x ----- ----- ---- ---- ------ -- = 29.1 mL energy drink

    .. .. ... ... 1.... .... ... 194.2 mg caffeine... 0.04529 mmol caffeine

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  • 10 months ago

    The moles of caffeine that you need is 0.256/Mw of caffeine which is basically m/Mw.

    You have the concentration which is 0.04529 and you have the number of moles that we just calculated... find the volume... which is V=n/c, that will give you the volume in litres.

  • |
    Lv 4
    10 months ago

    H10C8N4O2 so it is amino vor virus as part source?

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