Question

7.
A gaseous mixture contains 70% N, and 30% unknown gas by volume. If the average
molecular mass of gaseous mixture is 37.60, then the molecular mas of unknown gas
is
1) 42.2
2) 60
3) 40
4) 50​

Answer 1

Ans:- B

Detailed explanation in attachment

Answer 2

Answer:

option- b

Explanation:

GIVEN- A gaseous mixture contains 70% N, and 30% unknown gas by volume. If the average

molecular mass of gaseous mixture is 37.60

FIND- the molecular mas of unknown gas

SOLUTION- average mass- 37.60

average mass- percent of volume/100 +Gmm

3760= 70× 28+30 n

1800= 30n

n= 60

FINAL ANSWER- 60

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