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The vapor pressure of acetone at 20^(@)C...

The vapor pressure of acetone at `20^(@)C` is 185 torr. When `1.2 g` of a non-volatile solute was dissolved in `100 g` of acetone at `20^(@)C`, it vapour pressure was 183 torr. The molar mass `(g mol^(-1))` of solute is:

A

32

B

54

C

128

D

488

Text Solution

Verified by Experts

`(1.2/M)/(100/58)=2/183impliesM=(1.2xx8.3xx58)/(100xx2)=63.684~~=64`
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