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According to the equation for the Balmer line spectrum of hydrogen, a value of n=3 gives a red spectral line at 656.3 nm, a value of n=4 gives a green line at 486.1 nm, and a value of n=5 gives a blue line at 434.0 nm. According to these values, the wavelength differences between lines in the Balmer series become smaller as n becomes larger. In other words, the wavelengths converge toward a minimum value as n becomes very large.
At what wavelength (in nanometers) do the lines converge?
Three 5.00mL samples of this solution are titrated with DCP that had a standardized concentration of 9.94x10-4M. The three titrations took an average of 27.51mL of DCP. (MM Ascorbic Acid = 176.124 g/mol) Calculate the mass (in mg) in the vitamin C ..
Iodine-131 is a radioactive isotope. After 7.00 days, 54.7% of a sample of 131I remains.
if the hindenburg held 2.0 times 10^5 m^3 of hydrogen gas at 23 degrees C and 1.0 atm, what mass of hydrogen was present
consider the constitutional isomers 2-methyl-1-butene 2-methyl-2-butene and 3-methyl-1-butene. when each of these
In a seperate trial the student puts 214 mL of the same liquid into the same flask at the same conditions. What will the pressure measure (in kPa) in the second trial?
Calculate the amount of heat required to completely sublime 18.0g of solid dry ice (CO2 ) at its sublimation temperature
How many additional mL of 0.0750 M Ca(OH)2 or ).100 M HCl would be required to neutralize the solution?
A 0.00445 mol sample of a weak acid, HY, is dissolved in enough water to form 0.0976 L of solution. If the pH of the solution is 4.02, what is the Ka of HY? Use E notation with 3 significant figures.
A sample of solid ammonium sulfide (NH4)2S, is placed in a closed bulb which is then filled with 0.0150 mol of inert He gas. The pressure of the He at 25°C is 145 mm Hg.
Which one of the ions (i) Cl- and (ii) Ce3+ will be oxidized by MnO4- in acidic solution? Write balanced equations for these and calculate the standard potential for each reaction?
An anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
Suppose you pick up a 15-pound ball of iron (such as a "shot-put" ball at a track event). The iron ball has the same temperature as the atmosphere (26 °C). How many joules of heat energy must the iron ball absorb to reach the temperature of your b..
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