In an effusion experiment, it was determined that nitrogen gas, n₂, effused at a rate 1.812 times faster than an unknown gas. what is the molar mass of the unknown gas?

Molar mass of unknown gas = 91.93 g/mol

Explanation:

Scottish physicist Thomas Graham formulated a law known as Graham's law of effusion in 1848. He conducted an experiment and found the relationship between the rate of effusion of a gas and its molar mass as:

where,  

r is the rate of effusion of a gas

M is the molar mass of the gas.

And for two gases taking different rate of effusion as r₁ and r₂ to effuse, the formula is:

So,  

For nitrogen gas :

= 1.812*

= 28 g/mol

For unknown gas:

= ? g/mol

Molar mass of unknown gas = 91.93 g/mol

the objects have the same charge is correct.

nathan lee