Questions asked by Cameron D.

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• How many sigma bonds and pi bonds are in O3?
  
• How many sigma and pi bonds are in SeO3 2-?
  
• Can you answer questions 19-22?
  
• Which of the following exists as discrete (or separate) molecules? a. potassium b. water c. quartz d. carborundum, SiC (hint, this is like a lot of carbons bonded together) e. hydrogen chloride gas
  
• If we used 0.050 molal solution of Na2SO4 what would be the boiling point? (HINT: first decide if ionic or covalent to figure out “i”).
  
• What is the average atomic mass of Lithium if 7.42% exists as 6Li (6.015 g/mol) and 92.58% exists as 7Li (7,016 g/mol)?
  
• Neon has two major isotopes, Neom-20 and Neon 22. Out of every 250 neon atoms, 225 will be Neon-20 (19.992 g/mol), and 25 will be Neon-22 (21.991 g/mol). What is the average atomic mass of Neon?
  
• In an electron microscope, electrons are accelerated to great velocities. What is the wavelength of an electron traveling with a velocity of #7.0 *10^3# #"km/s"# ? The mass of an electron is #9.1*10^(-28)# #"g"#.
  
• Calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids. What is the molarity of a solution prepared by diluting 165 mL of 0.688 M calcium chloride to 925 mL?
  
• What are some pros and cons of using wind energy?
  
• How are solar cells used?
  
• What is the relationship between biography and history?
  
• What was Malthus’ theory of population growth? Do you think he was correct?