Homework Help: chemistry

Posted by preshi on Wednesday, May 2, 2012 at 3:26pm.

2. Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water at 25C = 23.8mmHg)

chemistry - DrBob222, Wednesday, May 2, 2012 at 4:48pm
Use PV = nRT
P = 0.980 - (23.8/760)
V = 7.8L
n = solve for this
R = 0.08206
T = 298
1 mol H2 = 1 mol Zn
g Zn = mols x molar mass.
chemistry - Anonymous, Friday, September 21, 2012 at 1:11pm
19.8g

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