When acetone is injected into the Mass Spectrometer, what is the m/z value of its molecular ion? If this molecular ion, fragments by loss of a methyl radical, what is the m/z value of the resulting ion?
For that question I have no clue where to start. How do I know the m/z for any of the elements? Is it suppose to be memorized? Shown on a graph?
Actually, it's pretty easy to calculate. Do you know what a mass spec does, and how it works? You can memorize some element masses, if you want to, but you might be able to find them, in a table, of some sort ... periodically.
Next question asks for the molecular weight of pyridine, cocaine, and trimethylamine and asks what the three molecular weights have in commmon?
I seriously just see 3 numbers? Suggestions on what they want me to focus on?
Well, just for the fun of it, what are they. Let's see if a pattern emerges. This probably has something to do with how a mass spec works, I'm guessing.
and Lastly, this question asks for teh molecular weight of Nicotine and asks if this weight has the same property as the last three above?
Again no clue.
Suggestions?
Well, lets see that as well. As fr suggestions, you seem very sure that you have no chance of solving this problem. I suppose it would have stymied me in school too. But I've actually used a mass spec this way, in training courses I elected to take, and in industry, so I don't agree that your situation is as hopless as you imply.