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A ground-state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and a second to return to the ground state.
Rydberg constant = R = 1.096776 × 107 m^?^1h = 6.626 x 10-34 J.sc = 2.998 x 108 m/s
1. What higher level did the electron reach?
2. What intermediate level did the electron reach?
3. What was the wavelength of the second photon emitted?
A 295 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
Given the average bond enthalpies listed below, calculate the delta H for the reaction: N2 + 3H2 --> 2NH3
How many grams of potassium accetate must be added to 2.5 L of .250 M acetic acid
Gold can be hammered into extremely thin sheets called gold leaf. A 210. mg piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 4.2 1.0 ft. What is the average thickness of the sheet in meters? GIVEN: 2.54 cm = 1 inch
Identify where this investment would be classified on the balance sheet of Cookie & Coffee Creations Inc. and explain why. What amount would appear on the balance sheet under each of the methods of accounting for the investment?
A key year for them is 2015, when Southeast Asia's Open Sky Agreement comes into effect, allowing unlimited flights to all 10 ASEAN members: Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.
Determine the variance for each line of the profit and loss statement in both dollar terms and percentage terms
Fall proportionately more than the change in GDP, Fall proportionately less than the change in GDP, Rise proportionately more than the change in GDP
How are permanent codes different from temporary codes? What could be the result of a system without permanent codes? Provide examples in your answer.
How has The Home Depot's profitability changed over recent years? On what measures are you basing your response? If you were one of the company's corporate managers, would you be satisfied with the trend in gross profit?
The burning of sufficient magnesium in oxygen to form 2.00 grams of magnesium oxide results in the liberation of 30.1 kj.
How many grams of LiCl are needed to make a saturate solution with 300 grams of H2O if the molality of the solution is 19.7.
Assume that the kinetic energy of a 1500kg car moving at 95 km/h can be converted entirely into heat. What amount of water could be heated from 20 C to 50 C by the car's energy?
If 0.345 moles are produced during a reaction and collected at a temperature of 294K and pressire of .981 atm what volume will the gas occupy?
What is the de Broglie wavelength (in meters) of a baseball weighing 145 {g} and traveling at 159 km/h?
Calculate the surface tension from 0.028M soap solution at 293K. If the surface tension of 0.056M soap solution is 0.0433Joule per kelvin square. Surface tension of pure water is 0.0728 joule per meter square.
Diamond has a face-centered cubic unit cell, with four more C atoms in tetrahedral holes within the cell. Densities of diamonds vary from 3.01 g/cm3 to 3.52 g/cm3 because C atoms are missing from some holes.
Barium sulfate, , is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail
The solubility of a gas in water is 0.22 g/L at 20.0 kPa of pressure. what is the solubility when the pressure is increased to 115 kPa?
What is the theoretical yield of SO 3 produced by the quantities described in Part A and How many Oxygen molecules are required to react with 7.82g of S?
Which of the following could be the results of the decomposition of the other sample, being consistent with the law of constant composition (also called the law of definite proportions or law of definite composition)?
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base.
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