Which formula can be used to determine the number of carbon

Which formula can be used to determine the number of carbon atoms in a molecule based on the intensities of the M+ and (M + 1)+ peaks? 0 0.011 XM+/(M + 1)+ (M 1)M x0.011 0.011 x (M 1)M

Solution

The two intensities are = M+ and (M+1)+

12C : 13C

Relative absence = 100:1.1

(M+1)+ / M+ = n x 1.1/100

Number of carbon atoms

n = (M+1)+ / (0.011*M+)

Option B is the correct answer