Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysis of estradiol gave the mass percent composition: C, 79.37%; H, 8.88%; O, 11.75%. The molar mass of estradiol is 272.37 g/mol. Find the molecular formula of estradiol.

Solution 122P

Step 1:

Given :

Mass percent composition of C = 79.37%

Mass percent composition of H = 8.88%

Mass percent composition of O = 11.75%

Molar mass of estradiol= 273.37 g/mol

Molecular formula of estradiol= ?

To find the molecular formula, we need to find the number of atoms.

number of moles (n) =

To find the mass of element here, we multiply the mass percent composition with the molar mass of estradiol.

Mass of carbon (C) =273.37 = 216.97 g

Mass of hydrogen(H) =273.37 = 24.27 g

Mass of nitrogen(O) =273.37 = 32.12 g