But seriously I need some major help. I made this in the intellectual forum, that's how serious I am. Though If you know but can't respond to this, please message me.

So we're working with partial pressure of H20. We'll have a chart about water vapor pressure and all that jazz. Here's a problem from the review sheet.

Find the partial pressure of hydrogen gas collected over water at 10 degrees C and 450 Torr?

Not even the answer, just the formula I would use. Please.

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I happen to think you're pretty dandy.

My best guess would be

PV = nRT

where you calculate the partial pressure based on molar ratio.

Don't forget, the units are quite fickle in this equation.
http://en.wikipedia.org/wiki/Ideal_gas_constant will give you the appropriate R value based on what units you use for the rest.

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You'd think a thousand miles would be enough,
I guess I'll keep walking.