00:01
To identify substance f that contains only carbon, hydrogen, and oxygen that has an m plus one peak at 95, we need to determine what the chemical formula would be for the compound.
00:16
For now we'll call it cxhy and then oz.
00:22
In order to get a 6 % about 6 .6 % intense m plus one peak compared to the m peak, the molecular ion peak, because the carbon 13 isotope has a relative abundance compared to carbon 12 of about 1 .08%, we're going to need at least six carbons.
00:46
So we know that x is at least six.
00:49
Well, it needs to be six.
00:51
The additional mass will come from the fact that we have hydrogen, which can exist as deuterium, and oxygen that can exist as the heavier isotope, oxygen 17.
01:07
If we were to identify what the molecular ion peak would be, if the m plus one is 95, the molecular ion peak is going to be 94, which would correspond to six carbons at a mass of 12 amu, one oxygen at a mass of 16, and six hydrogens at a mass of one, and this gives us our 94...