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March 28, 2015

Homework Help: Intro to chem

Posted by pooja on Thursday, April 14, 2011 at 1:15pm.

What is the volume of 19.7g of oxygen at STP?

Heres what i got but did not get the same answer..pls tell me where i am wrong!

(grams to moles)
19.7g x 1 mol/ 16.00 = 1.23 mol Oxygen

(Pv=nRT) looking for V
1.23 mol x 0.0821 x 273K / 1.00 atm = 27.57

CORRECT ANSWER is 13.8L!

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