Question

What is the approximate molecular mass of dry air containing 78% nitrogen and 22% oxygen?

Answer 1

Answer:

hi there!!!

Explanation:

Gn,

Mass of nitrogen = 0.78 g

Mass of oxygen = 0.22 g

To calculate: molecular mass of dry air.

MM of dry air = percentage composition in air * molecular mass of that                                      compound.

                      = (0.78)(28) + (0.22)(32)

                      = 21.84 + 7.04

                      = 28.88 g/mol.

Hope my answer helps u.......