# Chemistry

A steel container of oxygen has a volume of 20.0 L at 22 C @35 atm. What is the volume @ STP? How many mol of oxygen are in the container?

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1. I would use P1V1/T1 = P2V2/T2 to convert from the conditions listed to STP. Then I would use PV = nRT to determine moles.

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2. Not sure on this, I get that whole formula but I don`t have a P2V2/T2 to use in the equation. And do I need to change the 35 atm somehow by using the 760mmHG?

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3. Sure you do. STP is 1 atm for P and 273 Kelvin for T. Don't forget to use Kelvin for the other temperature.

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4. 2.37 STP??

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5. 700 ?

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6. P1 = 35 atm
V1 = 20.0 L
T1 = 22+273 = 295

P2 = 1 atm
V2 = ??
T2 = 273

(35*20/295) = (1*V2/273)
solve for V2.
It isn't 2.37 and it isn't 700.

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7. ???? Still cant figure it out...

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8. 756.4 ?

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9. .00869?

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10. 35*20/295=2.372
2.372/273= .00869?

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11. 18.50?

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12. 647.79 ??

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13. I got 647.79 too, is that correct

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