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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 ?max=550nm?
b. 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?
a manufacturer of metal polishing compound which can polish SS items by buffing method. Currently am using Calcined Alumina Polishing grade as a main ingredient but i need much more polish.
consider the reaction in which 410g of Ca(NO3)2 react with just the right amount of magnesium metal in a single replacement reaction. how many grams of lithium are required?
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 82% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9*10-12.]
What is the pressure exerted in the closed end of an apparatus if the atmospheric pressure is 720 torr and the height of the water column is 22.3 cm?
Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. (a) 100.0 mL of 0.42 M HC7H5O2 (Ka= 6.4 multiplied by 10-5) titrated by 0.42 M NaOH halfway point equivalence point
Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn2+(aq)+2e??Zn(s) For a large batch of nails
Zinc sulfide reacts with nitric acid to give zinc sulfate and nitric oxide. Calculate the mass of zinc required to react with 110 mL of 0.15 M nitric acid.
60.0 mL of a 0.450 M solution is titrated with 0.570 M . Calculate the volume of required to reach the equivalence point.
What is the change in entropy for the system, surroundings, AND total for the following processes
How many milliliters of 0.200 M NaOH are needed to neutralize 100. mL of 0.100 M HCl
A mixture of helium and neon gases is collected over water at 28.0 C and 745 mmHg. if the partial pressure of helium is 368 mmHg, what is the partial pressure of neon?
Draw all the resonance structures for the N2O4 molecule. The skeletal structure of the molecule is
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