Assignment:
Comparison of chemicals and compound properties
Q1. Explain in terms of viscosity and intermolecular bonding why (10-30) weight motor oil protects your car's engine better in the winter time and (20-40) better in the summer time.
Q2. Explain why in terms of surface tension, why water beads up on a cold day on a freshly waxes car hood and forms nearly spherical drops (in outer space they are perfect spheres). Also, why have water bugs almost become extinct due to high detergent use since the 50's.
Q3. Explain in terms of heat vaporization why you feel cool when you get out of the pool in Las Vegas on a breezy 110 Fahrenheit summer day.
Q4. Explain why ice is less dense than water, and therefore floats on water. (A diagram/sketch would be best). Why is H20 most dense at 4 degrees Centigrade? Explain.
Q5. Compare the three (3) procedures for the purification of water for bottled water. Which is the BEST? (in your opinion - and explain). Which toxins are present in Dallas water? Are the levels safe - how can you be sure? Is bottled water really safer? Explain with documentation. You may need to go to the internet for sources for this.
Provide complete and step by step solution for the question and show calculations and use formulas.