(YouTube Link) - (8min) This video does a great job with simplified graphics explaining how a mass spectrometer works and showing the graphs that can be generated from the machine. 

(YouTube Link) -  (8min) This video is a great simple explanation for how mass spectrometer data is used to find an empirical formula and how that works. It goes through basic concepts of the mole and how they relate to formula mass as well before working through an empirical formula problem. 

(YouTube Link) - This is a link to a video I made for a previous chemistry course so don't worry about that it says Unit 10, Chemistry 215, or anything else specific to the old course that may come up in it (for example it says that you will be given a reference sheet for predicting products from decomposition, etc but you will NOT get a prediction reference sheet in APC). The video goes over some equations from a worksheet for how to predict products. Use for reference if needed. THIS is a link to the worksheet the problems are coming from. 

These resources are another teacher's practice test for their Chp. 1-3 and they align well with what we have done so far too. If you run across something we have not done exactly remember that you WILL have questions on the exam in May that you don't know how to do. So it's a good opportunity to practice figuring something out from scratch that you have the tools to be able to do. HERE is a link to the practice questions themselves and the vodcast linked to the left is from that teacher explaining how to solve each problem. You can get the answers and extra help from the video. I put a link to a playlist of his practice tests in the "APC - Links" section of this website as well if you like his explanations and want to use his tests for other topics.