Explain how the rate of diffusion of a gas is related to its molar mass. Carbon dioxide gas (CO2) effuses 3.2 times faster than an unknown gas. Determine the molar mass of the unknown gas. Show your work or explain your answer, giving specific values used to determine the answer

Molar mass of an unknown gas : 450.56 g/mol

Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or  

the effusion rates of two gases = the square root of the inverse of their molar masses:  

or  

M CO₂ = 44 g/mol

Carbon dioxide gas (CO2) effuses 3.2 times faster than an unknown gas, so r₁=3.2 r₂

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