Question

A) 2/7
B) 2/9
C) 2/5
D) 4/7​

Answer 1

Answer:

2/7 is the correct answer I think it is help ful

Answer 2

Answer:

Given conditions ⇒

Mass of the Methanol = 64 g.

Molar mass of the Methanol = 32 g/mole.

∵ No. of moles of Methanol = given mass / molar mass = 64/32 = 2 moles

Mass of the Water = 126g.

Molar mass of the water = 18 g/mole.

∴ No. of moles of Water = 126/18 = 7 moles

Now, Total number of moles in a solution = No. of moles of Methanol + No. of moles of water.

= 2+7=9moles

Now,

Mole Fraction of Methanol in the solution

=No. of moles of Methanol/Total no. of moles in the solution = 2/9