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Q.

The density of a gas at STP is 1.5g/L at STP.  Its molecular weight is

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a

22.4

b

33.6 g

c

10L

d

80L

answer is C.

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Detailed Solution

d=mv

Mass = 1.5 gms

1.5 gms gas occupies 1 lit at STP

We know, molecular weight of gass occupies 22.4 lit at STP

 Moleculr weight of gas  =22.4×1.5=33.6gms (or) 33.6 amu.  

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