# Problem: Calculate the mole fractions of methanol, CH3OH; ethanol, C2H5OH; and water in a solution that is 40% methanol, 40% ethanol, and 20% water by mass. (Assume the data are good to two significant figures.)

###### FREE Expert Solution

Mole Fraction (X) relates the moles of solute and solvent within a solution:

Assuming that we have 100 g:

• 40% methanol → 40 g CH3OH
• 40% ethanol → 40 g C2H5OH
• 20% water → 20 g H2O
95% (138 ratings) ###### Problem Details

Calculate the mole fractions of methanol, CH3OH; ethanol, C2H5OH; and water in a solution that is 40% methanol, 40% ethanol, and 20% water by mass. (Assume the data are good to two significant figures.)

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Fraction concept. You can view video lessons to learn Mole Fraction. Or if you need more Mole Fraction practice, you can also practice Mole Fraction practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Zhang's class at SCAR.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.