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Problem- Given the following half-reactions occurring in the silver-zinc hearing aid battery, calculate the voltage at 25°C of this battery.
ZnO(s) + H2O(l) + 2 e- --> Zn(s) + 2 OH- E° = -1.260 V
Ag2O(s) + H2O(l) + 2 e- --> 2 Ag(s) + 2 OH- E° = +0.342 V
Write your solution in appropriate format and provide references
Calculate the pH of a solution that is 0.25M pyridine, C5H5N and 0.75M in pyridinium bromide, C5NHBr. (Kb for C5H5N= 1.7 * 10^-9)
On a long standing, an open bottle of aspirin will develop an odor of vinegar. What causes this to happen?
Calculate the concentration of Ag+ in a solution prepared by mixing equal volumes of 2.0×10-3M AgNO3 and 0.20M NaCN .
Tartaric Acid is a diprotic acid with ka1=1.0*10^-3 and ka^2=4.6*10^-5. Calculate the concentration of tartarate ion, C4H4O62-, present in 0.015 M aqueous H2C4H4O6 soultion
highlight by clicking on the asymmetric carbons if any, and indicate whether each compound is Chiral and Number of stereocenters
The percent ionization of niacin (C6H5NO2), (whose Ka is 1.5 x 10^-5) in a .020 M solution is 2.7%. Calculate the percentage of niacin molecules ionized in a solution that is (a) 0.010 M (b) 1.0 x 10^-3 M
If I add 1.65L to 112g of sodium acetate what is the molality of sodium acetate in the solution
These air conditioners are recharged from stockpiled supplies of CFC-12. If each of the 100 million automobiles contains 1.1 kg of CFC-12 and leaks 25% of its CFC-12 into the atmosphere per year, how much Cl in kilograms is added to the atmosphere..
Explain when doing a recrystallization using a Buchner funnel, what happens to the impurities that are more soluble than your compound in the solvent used
Problem- When 1.642 atm of methane reacts with 1.157 atm of oxygen at a constant temperature in a closed rigid container to form carbon dioxide and water vapor, what is the theoretical yield (in atm) of carbon dioxide
0.25 g of sodium hydroxide (NaOH) pellets are dissolved in water to make 8.0 L of solution. What is the ph of this solution?
A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm. If the temperature remains at 25 °C throughout the process, what was the initial pressure in ..
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