Question

480 cm3 of an unknown gas at S.T.P. weigh 0.643 g. Calculate the molar mass of the gas.
please give the answer​

Answer 1

Answer:

Correct option is

D

56 g

Density of the gas at STP = 2.5 g/L

At STP volume of the gas = 22.4 litres/mole

6.023×10

23

molecules contains 1 mole of gas = Molar mass of gas

So, Density=

Volume

Mass

⟹2.5=

22.4g/mol

Molarmass

∴ Molar mass = 56 g/mole