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August 21, 2014

Homework Help: Chemistry

Posted by Bradley on Wednesday, July 13, 2011 at 10:15pm.

Question: What mass of water, in grams, would have to be decomposed to produce 17.6 L of molecular oxygen at STP?

Work:
n=PV/RT
x=(1 atm)(17.6 L)/(0.0821)(273 k)
x = 1.27348295454546

1.27348295454546 x 2 = 2.54696590909092

Grams= Moles x 18.0
Grams = 2.54696590909092 x 18.0
Grams = 45.8


I think I'm messing up somewhere, but I don't know what I'm doing wrong.

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