Posted by **Peter** on Tuesday, January 29, 2013 at 5:26am.

If there are 5 liters of oxygen gas (O2) at 300 K and 400 torr, what will it weigh?

Answer in units of g.

Do I use the Ideal gas law formula for this problem?

- Chemistry -
**DrBob222**, Tuesday, January 29, 2013 at 2:41pm
Yes, use PV = nRT and solve for n, then

n = grams/molar mass and solve for grams.

- Chemistry -
**Peter**, Tuesday, January 29, 2013 at 5:58pm
When I use this formula do I have to convert torr to atm and mL to L?

- Chemistry -
**Peter**, Tuesday, January 29, 2013 at 6:20pm
I got around 5.48g...

I think it's wrong

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