Posted by **CL** on Wednesday, January 27, 2010 at 12:52am.

What weight of H2 at STP could be contained in a vessel that holds 4g of oxygen at STP?

First, I used the Ideal Gas Law to find the volume of oxygen at STP, but im not sure what to do from there..

- chemistry -
**DrBob222**, Wednesday, January 27, 2010 at 5:52pm
Use PV = nRT again. You know volume from the previous work, then plug in R, T, and P, calculate n for H2. Then moles = grams/molar mass will allow you to calculate grams.

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