aliaja Posted February 10, 2013 Share Posted February 10, 2013 Hello, everyone. There was an in-class organic chemistry quiz I took recently and my professor posted the answers online. I have been going through the quiz to understand the problems and the answers to them (my professor also explained the answers), but I am still confused about a few of them. I have attached a picture of part of the quiz (It would be too difficult/confusing to explain without it) and was hoping someone could help me understand the 4 blanks that appear before the word "Hz." In other words, can someone please help explain why those answers are what they are? I followed a certain formula, but seem to be unable to obtain the answer on the key. Those are the only four blanks that I am having trouble with. Everything else makes perfect sense. Thank you in advance. Link to comment Share on other sites More sharing options...
Fuzzwood Posted February 10, 2013 Share Posted February 10, 2013 Doing the last line: you know the MHz of the NMR machine: 200 MHz = 200.000.000 Hz. 1.53 ppm (parts per million) of that amount of Hz = (200.000.000/1.000.000) * 1.53 = 306 Hz Link to comment Share on other sites More sharing options...
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