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chris r
Lv 5
chris r asked in Science & MathematicsChemistry · 1 decade ago

Chemistry help?

One tablet of a particular analgesic contains 152 mg of acetaminophen (C8H9NO2). How many acetaminophen molecules are contained in the tablet?

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  • skipper
    Lv 7
    1 decade ago
    Favorite Answer

    Molar mass of C8H9NO2 = 151 g

    152 mg (0.152 g) = 0.00101 moles of acetaminophen

    (0.152 g / 151 g/mole = 0.00101)

    6.022x10^23 molecules per mole x 0.00101 moles = 6.05x10^20 molecules

  • Kenneth L
    1 decade ago

    Use Avogadro's number and convert from mg to grams to moles to number of molecules

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