There will be 3 peaks that appear when the charge is +1 - 35x2, 35+37 and 37x2 Whichever one is listed is the answer so in this case 35+37 is 72 which is listed so D
There will be 3 peaks that appear when the charge is +1 - 35x2, 35+37 and 37x2 Whichever one is listed is the answer so in this case 35+37 is 72 which is listed so D
In this situation, you need to remember that you're looking at the isotopes inside a molecule not the abundance of the molecule which is why people get confused
Someone has answered the second question for you, so I'll answer the first one.
The spectrum (x axis) is labelled with increasing m/z, and the peak furthest to the right (with the highest m/z) is called the molecular ion peak.
The peak is only called the molecular ion peak if the spectrum represents a molecule, not a single element.
The molecular ion peak tells you the total mass (Mr) of the molecule, therefore from your answers (A-D) find which molecule has an Mr of 58, which is A.
For the second one, you need to think about which molecules are polar and which are not. You can draw a diagram of each if it helps and see where the polarity is. You should see that tetrachloromethane has negative bits all around and a positive bit in the middle. Because of that symmetrical distribution of charge (instead of having one end being delta positive and one end being delta negative), the molecule is non-polar so isn't really affected by charge.
Thank you soooooo much!!! Now i understand it!!! God! My teacher gave it in a really messed up way and you just explained it perfectly!!! Thank you!!!!!!