Hey guys these are very useful videos that will help you understand the upcoming lessons regarding gas laws.

Chemistry 7.4d Combined Gas Law

Here are the Gas Laws notes and worksheets:

Video on how to rearrange the variables in the combined gas law equation to isolate the unknown variable: http://www.youtube.com/watch?v=V89vHYQKLJo

Video on the combined gas laws and practice problems: https://www.youtube.com/watch?v=bftkRnTcFj8

Video on understanding conversion factors: https://www.youtube.com/watch?v=HZ9weUkSdoY