A sample of gaseous methyl ether has a mass of 8.12g and occupies a volume of 3.96L at STP. What is the molecular weight of methyl ether?

Molar volume is when 1 mol of any gas occupies 22.4 L at STP.

Methyl ether has a mass of 8.12 g,

Volume occupied - 3.96 L

If 22.4 L occupied by 1 mol of gas

Then 3.96 L occupied by 1/22.4 x 3.96 = 0.176 mol of gas

The mass of 0.176 mol = 8.12 g

Molar mass is mass of 1 mol

Therefore mass of 1 mol = 8.12/0.176 = 46.1

Molecular weight is 46.1 g/mol