Chem. 105 Review Lectures
Here are some mini lectures of problems similar to those done in class.
Read the problem, then click on the link to watch the solution. These lectures are performed in Windows Media Player and in Quick Time, so choose the format that works for you. Make sure you watch on full screen. There is accompanying sound. If the computer you are working on has no speakers you can use headphones. Bring your own Walkman type headphones if you are using the Cerritos College computers. Some of the problems are done in more than one part due to disk space.
Metric Conversions
How many cg in 451.5 Kg?
Density
A rock has a density of 3.68 g/cm3. What is the volume of the rock if it has a mass of 22 lbs?
Gases
Energy of Reaction
A 2.45 g peanut is burned under a beaker containing 125 ml of water. The initial temperature of the water is 21.5 oC. The final mass of the peanut is .08 g and the final temperature of the water is 76.9 oC. How much heat did the water absorb?