The formula for the illegal drug cocaine is c17h21no4 (303.39 g/mol). what is the percentage of hydrogen in the compound? 21.09% 4.618% 67.30% 6.991% 3.959%
molar mass is the sum of the products of molar masses of individual elements by the number of atoms of the element in the compound. molar mass of H - 1.01 g number of H atoms - 21 H atoms therefore mass of H in 1 mol of compound - 1.01 g x 21 = 21.21 g the molar mass of the compound - 303.39 g/mol H composition percentage = [tex] \frac{mass of H in 1 mol}{molar mass of compound} *100%[/tex] composition percentage = 21.21 g/mol /303.39 g/mol x 100% H composition percentage = 6.991 %
