1.

Mass of 112 ML of abcartin gas is 0'22 g at STP?how many molecules are there in the sample of gas? What is the molar mass of the gas?

Answer»

Given :-

Volume = 112ML = 0.112L

MASS = 0.22g

To FIND :-

Number of molecules

Molar mass

Solution :-

We know :-

No of moles = Volume/Molar volume

No of moles = 0.112/22.4

No of moles = 5 × 10^-3

Number of molecules = Avogadro number × No of moles

Number of molecules = 6.022 × 10^23 × 5 × 10^-3

Number of molecules = 30.11 × 10^20

Molar mass = Given mass/No of moles

Molar mass = 0.22/5×10^-3

Molar mass = 0.044 × 10^3

Molar mass = 44g



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