Question

Molar mass of an organic compound is greater then 100. It contains only carbon,nitrogen and hydrogen.persentage of carbon is 6 times of percentage of hydrogen whereas the sum of the percentage of carbon and hydrogen is 1.5 times percentage of nitrogen.What is the minimum molar mass of its compound?

Answer 1

Let us denote as:
x- amount of carbon;
y- amount of nitrogen;
z- amount of hydrogen.
Thus:

x=6z
x+z=1.5y
12x+14+1z≥100

Finally x=18; y=14; z=3.
Answer : C_18 N_14 H_3.