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An electron can freely move inside a 500pm x 500pm square box. Find the five lowest energy levels for this electron. Which of them are degenerate?
A reaction mixture initally contains 0.56 atm CO2 and 0.32 atm CO. Determine the equilbrium pressure of CO if Kp for the reactions at this temperature is 2.25?
Calculate the amount of heat required to completely sublime 73.0 g of solid dry ice (CO2 ) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
How many grams of dry NH4Cl need to be added to 1.80L of a 0.400M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.90? Kb for ammonia is 1.8*10^-5.
Water (2290 ) is heated until it just begins to boil. If the water absorbs 5.43×105 of heat in the process, what was the initial temperature of the water?
How many moles of hydrogen gas would be needed to react with excess carbon dioxide
What mass of oxygen gas is required in order to release 6670 kJ of heat to the surroundings by the following reaction
NO2 then interacts withUV light according to the following reaction. Classify this reaction as a synthesis, decomposition, single-displacement, or double-displacement reaction.
Calculate the molarity of 500.0 cm3 of solution containing 18.5 g of calcium nitrate Ca(NO3)2
Ethylene glycol (EG) is a commonly used automotive antifreeze. Calculate the boiling point and the freezing point of the 25% EG solution if Kb=0.512oC/m and Kf=1.86oC/m for water. Molar mass of EG=60.05 g/mol.
Calculate the amount of heat liberated when 4.80 g CH4 reacts with an excess of oxygen.
How many grams of NO(g) can be formed from 3.0 moles of NH3(g) if there is sufficient O2(g) to use all of the ammonia?
Iron (III) oxide(s) is heated in excess carbon monoxide(g) to form iron(s) and carbon dioxide(g). If the percent yield of iron was 83.0% and the actual yield was 9.87 g, how much iron (iii) oxide was used?
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