Monday
March 27, 2017

Post a New Question

Posted by on .

Listerine mouthwash has 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash ?! ( the density of ethanol is 0.789 g/mL.)

how would yu do this problem ?!?!

  • Chemistry - ,

    If that is 21.6%(v/v), it means 21.6 mL EtOH/100 mL soln; therefore, 20 mL will contain
    21.6 mL EtOH x (20 mL/100 mL) = ?? mL EtOH.
    Then mass = volume x density.

  • Chemistry - ,

    3.40848g.
    I put this in and it was right.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question