Question

How to calculate molecular weight of a gas mixture?

Answer 1

add the atomic weight of all the constituents of the gas.

for example its carbon dioxide,

CO₂=

Carbon = atomic weight is 12

so 12*1=12amu

Oxygen=atomic weight is 16

so 16*2=32amu

when you add this,

=32+12=44amu

Hence molecular weight of carbon dioxide is 44amu.