Answer
Mole fraction of water = 0.066
Explanation
Given:
mass of methanol = 4.8 g
mass of water = 38 g
We know:
Molar mass of methanol = 32,04 g/mol
Molar mass of water = 18,01528 g/mol
Solution:
Step 1: Find the moles of methanol and water
n of methanol = m/M
n = 4.8g/32.04g/mol
n = 0.15 mol
n of water = 38g/18.01528
n = 2.11 mol
now mole fraction of methanol= mole of methanol/(mole of methanol + mole of water)
Mole fraction of methanol = 0.15mol/(0.15 mol + 2.11 mol)
Mole fraction of water = 0.066
