Question

Help!
How many moles of a gas sample are in 2.5 L container at 373 K and 203 kPa?

Answer 1

do you know the gas law?

Answer 2

the ideal gas law, which you will need to memorize is : PV=nRT
pressure in atm
volume in liters
n is mole
R constant is 0.0821 L*atm/mol*K
T in kelvin

Answer 3

you have pressure in kPa, change it to atm and you will get 2.003
this way everything else is ready, just plug and chug

Answer 4

PV=nRT
(2.003)(2.5)=n(.0821)(373)
5.0075=n(30.6233)
5.0075/30.6233=n
n=.1635 mol