February 26, 2017

Homework Help: chem

Posted by sarah on Friday, April 19, 2013 at 5:06pm.

A hydrogen-oxygen fuel cell operates on the simple reaction given below.
H2(g) + 1/2 O2(g) H2O(l)

If the cell is designed to produce 1.8 A of current, and if the hydrogen is contained in a 2.9 L tank at 200. atm pressure at 25°C, how long can the fuel cell operate before the hydrogen runs out? (Assume there is an unlimited supply of O2.)

so i first used pv=nrt and solved for n and got 23.71 moles but i don't know where to go from there

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