Homework Statement
A sample of 2.00 mol. CH3OH (g) is condensed isothermally and reversibly to liquid at 64*C. The standard enthalpy of condensation of methanol @ 64*C is -35.3 kJ/mol. Find w and q for the reaction.
Homework Equations
w = -nRT * ln(Vf/Vi) (although I don't have volume...
Wait so I did it right the first time? I don't have the answer in the book, unfortunately it is an even numbered problem.
Why didn't the formula you told me work?
Okay so d = MP/RT where M is the molar mass (or molar volume?)?
Sorry I just want to make sure. And thanks for the help guys. Like I said I saw that formula in the book but I thought it said it only applied at STP.
I take it that is the molar volume formula?
The reason why I didn't use that is because it says in my book that the formula for molar volume (above) is used under STP conditions. Did I read that wrong?
Homework Statement
The density of a gaseous compound was found to be 1.23 kg/m^3 at 330K and 20,000 Pa. What is the molar mass of this compound.
Homework Equations
PV=nRT
The Attempt at a Solution
I don't think this is right but I assumed a volume of 1 m^3. So I used ideal gas...
Homework Statement
2 H3PO4 + 3 Ba(OH)2 ---> Ba3(PO4)2 + 6H2O
What volume of 0.2M H3PO4 will be required to completely neutralize 100 mL of 0.6M Ba(OH)2.
What I did was used normality and said that there are 2*3 = 6N H+ ions and 3*2 = 6N OH ions. Therefore, I multiplied the normals by...
Homework Statement
Identify the oxidizing agent and the reducing agent and write a balanced equation for each half reaction.
MnO4(1-) + VO(2+) ----> Mn(2+) + V(OH)4 (1+)
Homework Equations
None.
The Attempt at a Solution
I know how to do these when there is just one atom...
Yeah that is the problem I am having. How do I know what the molar ratio of EDTA to any metal is? The book doesn't explain it in the examples, it just throws the ratio in there. It gives a 1:1 ratio to EDTA:Mg(NO2)2 but not sure about the others.
Thanks.
Okay I think I might have figured it out. Get moles of CoSO4, then multiply that by the molar ratio of EDTA to CoSO4 then multiply by the concentration of EDTA?
Homework Statement
A solution contains 1.694mg of CoSO4 (155.0 g/mol) per mL. Calculate the volume of 0.08640 M EDTA needed to titrate a 25 mL aliquot of this solution.
Homework Equations
Not really sure, the book is no help but this may help:
K(CoSO4) = [CoSO4] / ([CO2+] [SO42-])...
"Unable to start the application--the class file could not be loaded
Catastrophic failure"
It did this when I was using my CD to reload a toolbox that was corrupt. So I uninstalled the previous version, and even did so using a third party program that gets rid of EVERYTHING, then tried...