Solutions Question 345

Question: 12 g of a nonvolatile solute dissolved in 108 g of water produces the relative lowering of vapour pressure of 0.1. The molecular mass of the solute is:

Options:

A) 80

B) 60

C) 20

D) 40

Show Answer

Answer:

Correct Answer: C

Solution:

P∘−PsP∘=nN=wm×MW

0.1=12m×18108

m=12×180.1×108=20

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