Question

Vapour density of a gas is 14. Then the volume ocxupied by 2.8gm of gas at stp is

Answer 1

volume of gas at stp = 2.24 L

Explanation:

Given

Vapour density = 14

mass = 2.8 g

volume = ??

Solution

molar mass = 2 X Vapour density

molar mass = 2 X 14

molar mass = 28 g/mol

No. of Moles =  mass in grams/ molar mass

No. of Moles = 2.8 / 28

No. of Moles = 0.1 mol

at stp 1 mol = 22.4 L/mol

volume of 0.1 mol = 22.4 X 0.1

volume = 2.24 L