Question

How can I calculate the mass percent of carbon, nitrogen and oxygen in acetamide, C2H5NO?

Answer 1

Partial mass of C, 12*2 = 24

Partial mass of H, 1*5 = 5

Partial mass of N, 14

Partial mass of O, 16

Now, total molar mass would be 24+5+14+16 = 59

mass % of carbon = 24 * 100 / 59 = 40.67%