Question

1、2、5、6、7 please

CHM1020 Chapter 3 Homework Write the answers on the answer sheet provided. Attach work if appropriate All homework is scaled to 25 pts maximum. 1. How much energy is associated with an infrared photon with wavelength of 6.20 um? Report you answer in scientific notation. Show work. 4 pts 2. To draw the Lewis structure, first add the number of outer (valence) electrons contributed by each atom to obtain the total number of outer electrons. What is this value for CHFCI? 2 pts 3. Draw the valid Lewis structure of N. 4 pts :N:::N: 4. Draw the valid Lewis structure of H:0. 4 pts H: OIH 5. Using the figure below, specify the region of the electromagnetic spectrum where radiation with a wavelength of 70 um is found. 4 pts 10-14 10-12 10-10 wavelength() in meters 10 10 10- -ray's UV IR 10-2 102 Radio diameter of atomic nucleus diameter diameter of atom of virus diameter of diameter of diameter height of height of animal cell period.) of CD human skyscraper 400 450 500 550 600 650 700 wavelength() in nanometers 6. Calculate the average wavelength of a photon of electromagnetic radiation of 91 MHz. 4 pts 7. Place the year next to each event related to the history of ozone depletion. 12 pts Your choices are: 1930s, 1960s, 1974, 1977, 1977, 1987, 1990s. a. Chlorofluorocarbons (CFCs) are invented and used as propellants and refrigerants by people worldwide b. The United Nations meets and adopts the World Plan of Action on the Ozone Layer. c. The Montreal Protocol on Substances that deplete the ozone layer is signed and ratified by countries worldwide. d. F. Sheerwood Rowland, Mario Molina, and Paul Cruzen discover that CFCs are a major cause of stratospheric ozone depletion. e. The US and Canada ban the use of CFCs in spray cans. f. Production and use of CFCs and other ozone depleting agents dramatically decrease.

Answer 1

0 The where с speed of light is represented by Cand a = z z) = speed of light frequency of light 7= wavelength of light Photon bańc unit that creates light, It is a quantized energy. Its speed is the equal to 2.998 8 108 m/s in Here, wavelength = 6.20 eum The Einsten -planck relation defines the energy of photon is propertional to its frequency is the vaccum. 6.20 x 10-6m & and co-facter (h). So, E = ho anc 7 -34 8 6.626 X10 X 2.998 X10 6.2 x 10-6 26 19.86 x 10 3.2 x 10 6.2 x 10 -20 - J ha planch's constant = 6.626 x 10-34 m² kg/3 ☺ CHEU heck the 4 с heu H has nalence electoon, valence electrom. valence electrons. electons electron f has & valence a valence U hou

Levus structure us The Н. Fó :ű cic ce : 652 70 x 106m it will ue So, Given w wavelength to lem As ceen be observed an between 10-6 to 10 -4 So the region is IR. when 10-6 o.oooool increases No. when tox 106 0.oooo7 وب 10-4 2 0.0001 914100 Hz 2 (6) given frequency 91 MHz - 91 8106 sol we Know cara 8 mat - da ulo 2.9 98 xlo 91 x 10 6 S~! 0.0329 x 10 -2 in Z 3.29 X 10 x 10-4 m

a Chloroflurocarbonn (CFCs) are invented and used as propellants and refrigerants by is 1930s. people worldwide. 1928. So, ans St. osas reyntherized by Thomas Mid gley Jr.