Question

What is the average molecular mass of a gaseous mixture containing 1 mole of CO and 2
moles of Co, at STP?
(1) 30 g/mol
(2) 36 g/mol
(3) 38.66 g/mol
(4) 33.33 g/mol​

Answer 1

Answer:

Correct option is

A

440 g

Moles of N

2

=

28

280

=10moles

Assume, moles of CO

2

=x.

So, average molecular mass of mixture =

10+x

10×28+x×44

=36 (given)

So, x=10 moles

Therefore, weight of CO

2

=10×44=440 g

thank you .