1. If we measure this absorption spectrum from a nearby star: 400 445 475 510 570 590 650 780 And here is a chart of absorption bands: Hydrogen 400 445 475 510 570 590 650 780 Helium 400 445 475 510 570 590 650 780 Sodium 400 445 475 510 570 590 650 780 Lithium 400 445 475 510 570 590 650 780 What elements are present? Select all that apply: Hydrogen Helium Sodium Lithiun

1. If we measure this absorption spectrum from a nearby star: 400 445 475 510 570 590 650 780 And here is a chart of absorption bands: Hydrogen 400 445 475 510 570 590 650 780 Helium 400 445 475 510 570 590 650 780 Sodium 400 445 475 510 570 590 650 780 Lithium 400 445 475 510 570 590 650 780 What elements are present? Select all that apply: Hydrogen Helium Sodium Lithiun

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Topic: Transmittance and absorbance, lambert-beer law Substance X has an absorbance maximum at 530 nm. 500 mg of this substance X are dissolved in one liter of water and the reading at 530 nm in a 0.10 cm thick cell, with the absorbance value equal to 0.215. They dissolve in water until make 250 mL a 150 mg quantity of a salt known to contain species X as the only absorbing species at 530 nm. The absorbance reading of the latter solution in a 1 cm thick cell is 0.750, what is the weight% of X in the salt?
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What is the frequency , in hertz of an elctromagnetic wave with a wavelength of 795 nm? Use 3.00 x 10^8 m/s for the speed of light. Report your answer using scientific notaion and round to three significant figures .
Please answer the question as fast as you can. Thank you very much. Which of the following electronic configurations is not possible for an atom in an excited state (not ground state) ?