Posted by amy on Saturday, November 6, 2010 at 11:41am.
Use PV = nRT to solve for n = number of moles H2 gas. Remember V is in liters, p in atmospheres, and T in Kelvin. You will need to look up the vapor pressure of water at 25 C and calculate pressure as follows:
(746 mm - mm vapor pressure @ 25C)/760.
Using the coefficients in the balanced equation, convert moles H2 to mols Zn.
Finally, convert moles Zn to grams. g = moles x molar mass.
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