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You conduct an experiment where you use a single battery with a charge capacity of 900 mAh to precipitate an unknown metal from a salt solution that was leaking from an old battery. You use a vast excess of the salt, so the amount of metal condensed is limited by the battery. You obtain 3.368 g of the metal. You can assume that the metal was the only substance being reduced in the electrochemical cell and 100% of the listed battery charge is useable. If you were able to determine that the metal ion was a +2 ion, then which metal is it? This metal was used in batteries for a long time (even in "alkaline" batteries) due to its good electrochemical properties, but it is now being phased out. Why?
What is the number of moles of iron produced if only 4 moles of NaN3 are consumed. b)Determine the mass of Na2O produced if only 25g of iron
A sample of gas occupies a volume of 459 mL at 0.736 atm and 29 degrees Celsius. Calculate the volume of the gas if its pressure is changed to 0.957 atm while its temperature is held constant.
Complete and balance the following redox reaction in basic solution: H2O2 (aq) + N2H4 (aq) ? N2 (g) + H2O (l) Not sure what side gets OH- etc.
an equilibrium mixture of o2 so2 and so3 contains equal concentration of so2 and so3. calculate the concentration of o2
a 5.00-ml aliquot of a solution that contains 2.79 ppmfe2 is treated with an appropriate excess of thiocyanate and
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminol to H2O creating a solution with a total volume of 75.0 mL. What is the molarity of the stock solution of luminol?
the human eye contains a molecule called 11-cis-retinal that changes conformation when struck with light of sufficient
what chemical process occurs in the muscle cells to cause this discomfort and what chemical reactions have possibly taken place in the the body after the exercise. What possible treatments could be done for this person and how would the treatments..
suppose 600. g of p4 reacts with an excess of s8. how many grams of p4s10 can be produced assuming 80.0 yield based on
What is the specific heat of lead if it takes 97.5J to raise the temperature of a 75.0g block by 10.1 degress celcius?
For the reaction 3 C2H2=C6H6 at 25c the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K
Question- Calculate the pH of a buffer solution obtained by dissolving 15.0 g of KH2PO4 (s) and 29.0 g of Na2HPO4 (s) in water and then diluting to 1.00 L
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