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a. A household lightbulb is a blackbody radiator. Many light bulbs use tungsten filaments that are heated by electric current. What temperature is needed so that λmax=550nm?
b. A Helium-neon laser emits light at 632.8nm. Calculate the frequency of this light. What is the energy of a photon generated by this later?
c. Using the Rydberg formula, calculate values for the frequencies of the photons associated with the atomic hydrogen emission lines in the Lyman series(k=1) for: n=2,3,10,100 and infinity. Expressing your answer in terms of R. Note how the frequency converges to a limiting value; this value is called the series limit. WHat is the energy of a photon associated with the series limit of the Lymann series?
Mercuric sulfide HgS is one of the least soluble salts known, with Ksp=1.6x10^-54 at 25 C. Calculate both the molar solubility and the solubility of HgS
A turbine operates adiabatically with super-heated steam entering at T1, and P1, with a mass flow-rate, m(dot). The exhaust pressure is P2 and the turbine efficiency is gamma
At 25 degrees celcius a sample of NH3 effuses at a rate of .050 mole per minute. Under the same conditions, which gas effuses at approximately one-half that rate?
Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes
calculate the pH of the solution that results from adding 8.50ml of 0.100M NaOH to 50.00 mL of a 0.0500M solution of acetic acid.
How many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0 % yield?
An inflated balloon has a volume of 0.55 L at sea level (1 atm) and is allowed to rise to a height of 6.6 km, where the pressure is about 0.40 atm.
How much potassium nitrate has to dissolve in water to absorb 110 of heat?
1 oz of gold (density=19.3 g/ml) can be hammered into a sheet which would cover a 1.00 x 10^2 ft^2 area what is the thickness.
A laboratory procedure calls for making 570.0mL of a 1.6M KNO3 solution. How much KNO3 in grams is needed
Describe in detail(ex:individual resins used, etc) the purification of a protein from bovine live that has the following characteristics: Molecular weight of 86,500, pI= 8 and precipitates out of solution at 30% ammonium sulfate
If the mobile phase flow rate is 0.4 m/min, what is the analyte linear migration rate, and how long is the column?
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