Question

Determine the volume of one mole of an ideal gas at 25°C and 0.915 kPa.

@primeralph is it the same formula here?

Answer 1

Guess what formula.

Answer 2

v=ntr

Answer 3

pv = nrt.
You missed the p.

Answer 4

o

Answer 5

o? No it's p.

Answer 6

For pressure.

Answer 7

lol yeah

Answer 8

so v=ntr/p

Answer 9

Yes.

Answer 10

ok my answer is V=2.24 moles

Answer 11

or v=2.24ml

Answer 12

@primeralph which sign should it be?

Answer 13

ml or moles?

Answer 14

Volume. mL.

Answer 15

and it 2.24 correct? @primeralph

Answer 16

I didn't try it, but I trust your judgement by now.
I don't even think you need my help. Just get a sheet of the formula, remember units, and you'll be fine.

Answer 17

okey dokey thanks :)

Answer 18

Hold on.

Answer 19

What value did you use for R?

Answer 20

ok

Answer 21

0.08206

Answer 22

is it correct?@primeralph

Answer 23

No. That one works when your pressure is given in ATM.
Here it's in kPa, so R = 8314.4621

Answer 24

uh oh I messed up alot of problems then

Answer 25

it's ok I will just go fix them later, I am gonna go grab some icecream now :) thanks for all your help!

Answer 26

You have to look at your units. R varies with units.
Look at the table to the right.
https://en.wikipedia.org/wiki/Gas_constant

Answer 27

:) it's ok I will fix it :) thanks for catching that mistake though :)

Answer 28

You're welcome.