Question

If 3.7 grams of a gas contains 3.7 × 10^22 molecules, what is the molar mass of this gas in units of g/mol?

Answer 1

Molar mass of the gas will be 60.65 gram/mole

Step-by-step explanation:

We have given mass of gas = 3.7 gram

Gas contains
`3.7* 10^(22)`

We know that any gas contain
`6.022* 10^(23)` molecules in 1 mole

So number of moles
`=(3.7* 10^(22))/(6.022* 10^(23))=0.061`

We know that number of moles
`n=(mass\ in\ gram)/(molar\ mass)`

So
`0.061=(3.7)/(molar\ mass)`

Molar mass = 60.65 gram/mole