Question

What is the mass of a sample of neon gas if the volume is 10 L at STP?

Answer 1

Well `"STP"` specifies `100*kPa` and `273.15*K`...

Explanation:

And so we solve for `n_"moles of gas"` in the Ideal Gas equation, and of course we have to fish out an appropriate gas constant...

`n=(PV)/(RT)=(100*kPaxx10*L)/(8.314*L*kPa*K^-1*mol^-1xx273.15*K)`

`=0.440*mol`

And thus a mass of `0.440*molxx20.18*g*mol^-1`...approx. `9*g`...