Question

Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure?

40.0 grams of Ar
0.108 moles CH4
3x1023 molecules of H2
they would all have the same volume

Answer 1

Answer: 40.0 grams of Ar

Step-by-step explanation:

Using the formula
`PV=nRT`, we see that
`V` and
`n` are proportional, so we want the option with the most moles.

1. The atomic mass of Ar is 39.95 g/mol, so this sample has 1.001 moles
2. This sample has 0.108 moles.
3. Using Avogadro's number, this sample has
   `(3 * 10^(23))/(6.022 * 10^(23))=0.498` moles.