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Use the Rydberg equation to predict the wavelength of the electromagnetic radiation emitted for following electron transitions for the hydrogen atom (rounded-off to the nearest 0.1nm).
n = 3 ? 2n = 4 ? 2n = 5 ? 2n = 4 ? 3n = 2 ? 1
The equilibrium constant Kc equals 1.6 10-2 at 200°C. What are the moles of substances in the equilibrium mixture at 200°C if we start with 0.021 mol HBr in a 1.3-L vessel?
alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis
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
A compressed nitrogen cylinder from Praxair has a volume of 43.0L and a maximum pressure of 2265 psi. Assuming that the temperature is 293K
The MnO4(-) is often used to analyze for the Fe(2+) content of an aqueous solution via the reaction MnO4(-)+Fe(2+)---> Fe(3+)+Mn(2+) in acidic solution. What is the ration Fe(2+):MnO4(-) in the balanced equation
compute the enthalpy change, (Delta H), for this reaction per mole of A. suppose that the specific heat =[4.18J/(g*Degrees C) and density=1.00(g/mL)?
What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.518g/L at 25 ?C and 721
Which of the following statements about free radicals is true? Free radicals are considered good because they are good oxidizing agents.
calculate the PH at the points in the titration of 20.00 ml of 0.318M NH3 when, a) 10.00 ml and 15.00 ml of 0.475 M HCl have been added.
Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, N or S, is a chiral compound, contains ONLY one functional group, and is a sulfide.
Determine how many grams are there in 4.5+10 22 molecules of Barium nitrate and determine what is the molar mass of a gas ?
At the point of equilibrium there were 82.63 g of Br2(l). Determine the total pressure in the 50.0 L container at equilibrium.
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