Question

How many moles of ammonia are there in a 5.00 L cylinder if they exert a pressure of 8.65 atm at 18.0 Celsius?

Answer 1

You can use the Ideal Gas Law:

`PV=nRT`
with `R=0.08214 (L*atm)/(mol*K)`

With `318°C=273+18=291 K`

So:
`n=(PV)/(RT)+(5*8.65)/(291*0.08214)=1.81 mol`