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For the hydrogen atom, consider the light emitted by an electronic transition from quantum level n = 3 to n = 1. Use the Rydberg equation (1 / wavelength = (1/n(smallest)^2 - 1/n(largest)^2) to calculate the wavelength of this transition in nanometers (nm) and to three significant figures.
The density of an unknown metal is 8.94 g/cm^3 and its atomic radius is 0.126 nm. It has a face-centered cubic lattice. Find the atomic weight of this metal.?
the density of aluminum is 2.70 g/cm3 and the density of chronium is 7.19 g/cm3. if equal masses of aluminum and chronium are trasnferred in equal volumes of water in separate graduate cylinders, which graduated cylinder would have the greatest vo..
propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows with attached protons in parentheses: delta 14 (2), delta 34.4(2), delta 50.0(1)
Calculate the mass of silver chloride required to plate 135 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag.
Write the balanced chemical equation for the following reaction. Phases are optional. Solid iron(II) hydroxide decomposes to form solid iron(II) oxide and liquid water.
In air and according to Stokes Law, the settling rate of particles is proprotional to the squares of their diameters, if they have the same densities
Ethylene is supplied by a 60.9-L gas cylinder initially at 2200.0 psig and 25.0°C. Once leaving the cylinder, a regulator reduces the pressure to 15.0 psig, and a valve allows 1.000 mL/s of ethylene at 25.0°C to flow into the reactor
a tank with a volume of 1.00M3 is filled with air at 0 degrees to 20 times its atmospheric pressure. How much volume will occupy at 1 atom and room temp?
Water solubilities of oxalic acid and sodium oxalate at RT are 10g/100 ml and 3.7 g/100 ml respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temperature, and filtering the resulting mixtu..
The Coal is fed with 200% excess water ( excess is calculated with respect to CO formation) 100% of coal is consumed. the selectivity to CO (with respect to CO2) is 1:1 the functional conversion of the CO is 50% what is the final gas composition. ..
Benzoic acid is used to titrate an unknown base, and the pH of solution is recorded during the titration. Halfway to the ultimate endpoint of the titration, the pH of solution was recorded at 7.64. What is the value of Kb for the unknown base?
To reduce pollution when coal is burned, it is important to remove mercury and sulfur compounds from the effluent. Identify which, ifany, ofthe following redox reactions are spontaneous under standard conditions
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