The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 57.10% and an m+1 peak of 6.83%.

how many carbon atoms are in the compound? (fill in an integer number)

There are 11 Carbon atoms in the compound.

Solution:

Carbon atom count is the ratio of the M peak to the M+1 peak.

Here M peak is 57.10% and M+1 peak is 6.83%. On applying the values in the formula we get,

Therefore, the number of Carbon atoms in the compound are 11.

Refer the image attached below for a better understanding of M peak and M+1 peak.

The heaviest ion that has the greatest m/z value is said to be the molecular ion peak in mass spectrum.

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