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1. Write the balanced equation of the reaction of O2 with vitamin C and determine the potential of the reaction. is the reaction spontaneous? explain.
2. suppose the water that you used had not been boiled/deoxygenated. how would this have affected the amount of thiosulfate needed in the back titration, and the amount of vitamin C that you calculated to be in the sample that you used? explain.
From the time the mass of the flask is first measured until the time it is finally measured, it is handled a number of times with oily fingers. Does this lack of proper technique result in the molar mass of the vapor in the flask being reported as..
Explain the results for the tube in which 1.0 M of NaOH was added to benzoic acid. Write an equation for this. Now describe what happened when 6 M of HCl was added to this same tube and explain this result.
If you are trying to recognize the molar mass of an unknown gas as well as your measurements is: atmospheric pressure = 1.05 atm, temperature = 25.0oC, volume = 0.167 L and the mass of gas collected = 0.357 grams. Define what is the molar mass of ..
Ammonia gas is produced by reacting hydrogen gas with nitrogen gas. To produce 50.0 g of ammonia gas using air as your source of nitrogen gas, what volume of air is required if the air is introduced at 29°C and 745 mmHg
Rate constants for the decomposition of acetaldehyde were measured at five different temperatures. A plot of ln k versus 1/t gave a slope of -2.09*10^4 K. What is the activation Energy for this reaction
An antacid tablet contraining calcium carbonate as an active ingredient required 9.53 mL or 0.0956 M H2S04 for comlete neutralization.
When it is present in aqueous solution, the metal strontium, Sr, exists as an ion with a charge of +2. Given this information, state the chemical formula of the metal salt, strontium nitrate.
A sodium hydroxide solution was standardized by titrating 26.50 ml of 0.1250 M standard hydrochloric acid. The initial buret of sodium hydroxide was 1.24 ml and the final was 33.26. What is the molarity of the base solution
How much heat is required to vaporize 25.0g of water at 100C. The heat of vaporization of water at 100C is 40.7 kJ/mole.
buffer contains 0.50 mol NH4+ and 0.50 mol NH3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00? pKa of NH4+ = 9.25.
What is the enthalpy of combustion (in kJ/mol) for acetone (CH3COCH3) under standard conditions (water is produced as a liquid)? Use the appendix in your textbook, do not enter units, and answer with 5 significant digits.
The bright-red color of highway safety flares comes from strontium ions in salts such as Sr(NO3)2 and SrCO3. Burning a flare produces strontium ions in excited states,
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