science

What volume of ethanol must be diluted with
water to prepare 674 mL of 0.854 M solution?
The density of ethanol is given as 0.789 g/mL.
Answer in units of mL

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asked by Susan
  1. You need a total volume of 674mL=0.674L


    Solve for moles of ethanol:

    Moles=Molarity*Volume (L)

    Moles=0.854 M*0.674L

    Moles of ethanol*(46.07g/mole)= mass of ethanol

    Density=Mass/Volume

    So,

    Mass/Density=Volume (mL)

    Mass of ethanol/0.789 g/mL=Volume (mL)

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    posted by Devron

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