12:10 ll spectroscopy homework hand... JPEG - 549 KB Chem 112 Homework Problems Concerning Spectroscopy 1. The wavelength of some particular electromagnetic radiation in a vacuum is 275 nm. energy that is associated with each photon of this radiation. Determine the frequency of the radiation and compute the 2. A beam of electromagnetic radiation consists exclusively of photons of wavelength 480 nm. this beam will strike a surface is 0.005 moles/sec. It is known that the rate at which the photons in a. Compute the energy associated with one of these photons. b. Compute the power of this beam. c. If this beam is focused on an area of 0.01 cm², compute the intensity of this beam. 3. A beam of electromagnetic radiation consists exclusively of photons of frequency 4.916 x 10 14 sec-. found to be 1357 J/sec. to a surface by this beam. The power of this beam is measured and Compute the rate at which photons are delivered Express your answer in moles/sec. Cherm l!2 Homework: Beer's haw 5-7 The molar absorptivity of a compound in aquenus solution at 765 nm is 1.54 x 10'. The percent transmittance of a solution of the compound in a cell with a 1.00-cm pathlength is 43.2. What is the concentration of the soiution? 5-8 A standard 2.50 x 10- M solution of a compound was prepared and piaced in a ce!l with a 5.00-cm pathiength. The percent transmittance of the solution at 347 nm is 58.6. Determine the molar absorptivity. 5-9 Convert the following absorbances to percent transmittance: (a) 0.113 (c) 0.430 (h) 0.878 (d) 0.217 (e) 1.023 5-10 Convert the foilowing percent transmittances to absorbances: (a) 12.3 (c) 44.8 (h) 87.8 (d) 62.1 (e) 37.6

Solve the following problem: (1.327 x 103 cm)3 = O 2.34 x 10-9 cm3 O 2.337 x 109 cm3 2.3368 x 10-9 cm3 O 2.337 x 109 cm O 2.34 x 10° cm

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Boxes 1-4 box 1 answer choices: 0, 3, 1, 2, or 4. box 2 answer choices: 2, 1, 3, 0, or 4. box 3 answer choices: 10.7, 0.241. 0.482, 0.804, 5.36, 0.121, 3.21, or 1.61. Box 4 answer choices: L^2/mol^2•s, L^3/mol^3•s, L/mol•s, 1/s, or L^4/mol^4•s

If the denisty of Platnuim is 19.32 g/cm3 what could the dimnesions of a cube be that weighted 1.00 kilogram.

A A Monate ab 4 Paragraph Help Search (Alt+Q) No Spacing Heading 1 Editing Dictate Sensitivity Voice Sensitwity Styles Two methods of separating an undissolved solid from a liquid are and The method for separating a dissolved solid from the water in an aqueous solution 15 • Using a solvent to dissolve only one substance in a mixture is called 2. A mixture can consist of two or more pure substances. Does that mean a mixture can only consist of elements? 3. Explain your answer to question number 2 4. Oil and water mixed together form a heterogenous or homogenous mixture? 5. 2.000 g of the unknown mixture was placed in an evaporating dish. The empty evaporating dish weighs 38.135 g. After subliming the ammonium chloride from the mixture, the evaporating dish and the remaining mixture weighs 39.775 g. (Put your answer in 3 sig figs and show your work) • What is the weight of the ammonium chloride? • What is the percent of ammonium chloride in the sample? Normal 1. Fill in the following…

The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.