please solve this

Asked by santosh357m | 28th Apr, 2020, 09:28: AM

Expert Answer:

According to Raoult's law-
fraction numerator P subscript o minus P subscript s over denominator P end fraction equals fraction numerator w cross times M over denominator W cross times m end fraction
P subscript o equals 100 space m m space o f space H g
P subscript s equals 70 space m m space o f space H g space left parenthesis d u e space t o space d e c r e a s e space i n space 30 percent sign right parenthesis
fraction numerator 100 minus 70 over denominator 100 end fraction equals fraction numerator w cross times 18 over denominator 100 cross times 60 end fraction
0.03 w equals 0.3
w equals fraction numerator 0.3 over denominator 0.03 end fraction
w equals 10 space g

M o l a l i t y equals m equals fraction numerator 10 cross times 1000 over denominator 60 cross times 100 end fraction equals 1.66 space m

Answered by Ravi | 28th Apr, 2020, 12:07: PM