Problem: The molecular weight of a gas is ___ g/mol if 6.7 g of the gas occupies 6.3 L at STP. A) 3.0 x 102 B) 24C) 8 x 10-2 D) 3.6 x 103 E) 27

FREE Expert Solution

Molecular Weight (MW)=gmol


Using ideal gas equation.


PV=nRT

PVRT=nRTRTn=PVRT


STP: 1 atm, 273.15 K

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Problem Details

The molecular weight of a gas is ___ g/mol if 6.7 g of the gas occupies 6.3 L at STP. 

A) 3.0 x 102 

B) 24

C) 8 x 10-2 

D) 3.6 x 103 

E) 27

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