What is the % mass of CO2 in this solution? The mole fraction of CO2 in a certain solution with H2O as the solvent is 3.6 × 10−4.?

Question

    A: 0.00088 %

    B: 0.036 %

    C: 0.088%

    D: 7.2 × 10−4 %

    E: 5.5 %

Answer 1

What does this have to do with personal finance?

Answer 2

D. the other returns are only ok to awful.   

Answer 3

Take 100 moles of the solution (or any other number you want, you get the same answer).

moles of CO2 = 100 moles * 0.00036

moles of H2O = 100 moles - moles of CO2

Calculate mass of CO2

Calculate mass of H2O

mass % CO2 = Calculate mass of CO2 / ( Calculate mass of CO2 + Calculate mass of H2O ) * 100