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Problem- What is the change in energy, wavelength and frequency of an electron that gets promoted to n=4 and returns to n=2?
Explain your strategy for completing your task, defining your rationale as relevant.
Explain why it is unwise to use column chromatography on compounds having boiling points below about 150 °C (760 torr)
A sample of the unknown complex is analyzed and has an absorbance of 0.528. What is the molar concentration of Cu^2+ ions in the unknown solution?
How many grams of dipotassium phthalate (242.3 g/mol) must be added to 700 mL of 0.175 M potassium hydrogen phthalate to give a buffer of pH 6.00?
many cigarette lighters contain liquid butane rm c4h10 lusing enthalpies of formation calculate the quantity of heat
what is the minimum area in square meters of the top surface an ice slab 0.251 m thick floating on fresh water that
when silver metal reacts with bromine at 298 k a spntaneous redox reaction takes place. calculate e initial andnbsp
the partial pressure of o2 in the lungs ranges from 25 mmhg to 40 mmhg. what concentration of o2 in grams per liter
The rate constant of a first order reaction is 4.45 x 10^-2 s-1 at 35 degrees C. What is the rate constant at 77 degrees C if the activation energy for the reaction is 60.2 kJ/mol
Oxalate ion, C2O4 2-, and permanganate ion,MnO4 -1,react in aqueous basic solution to give carbonate ion, CO3 2-, AND solid manganese dioxide,MnO2. What is the complete and balanced equation
calculate the distance traveled by the light during the brief delay required for the sound to reach you.
Some atomic properties depend on the average value of 1/r rather than the average value of r itself. Evaluate the expectation value of 1/r for a hydrogenic helium 1s orbital.
calculate the mass of Fe(NO3)3 that you would need to yield a similar conductivity value as the NaCl
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