The vapour pressure of ether at 20 Celsius is 442mm. When 7.2g of a solution is dissolved in 60 GM ether, vapour pressure is lowers by 32 units. If molecular weight of ether is 74 then the Mexican weight of solute is
Answers
Answered by
1
Answer:
13.0888
Explanation:
the vapour pressure sorry not answer this question because iam students of night classs
Answered by
0
Answer:
Correct option is
C
123 gmol
−1
we have,
P
B
0
P
B
0
−P
t
=x
A
442
442−426
=x
A
x
A
=
n
A
+n
B
n
A
moles of ether =
74
50
= 0.6756 moles
x
A
=
0.6756
n
A
very dilute solution,
n
A
=0.0244
so , molecular weight =
moles
givenweight
molecular weight = 123 gmol−1
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