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## A gas made up of atoms escapes through a pinhole 0.920 times as fast as Cl 2 gas. Write the chemical formula of the gas

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## Answers ( )

Answer:The gas with molar mass 83.9 g is

Krypton, KrExplanation:We know that as perGhram’s law of diffusion,r’/ r= square root (M/M’)

0r

Where

r= rate of diffusion of Cl2

r’= rate of diffusion of unknown gas= 0.920r

Also, M= molar mass of Cl2= 71 g/ mol

And, M’= molar mass of unknown gas which we have to find

Let us substitute the values in above equation

solving we get M’ = 83.9 g/mol

Therefore, the gas with molar mass 83.9 g is

Krypton,Kr