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The mass spectrum of an organic compound shows the relative abundances of M to be 55.08%...

The mass spectrum of an organic compound shows the relative abundances of M to be 55.08% and M 1 to be 2.979%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%

How many carbon atoms are there?

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