Unit 5 Quiz Review

Question

What is the empirical formula for the over the counter pain reliever naproxen (Aleve)? It is 73.03% Carbon, 6.13% Hydrogen, and 20.84% Oxygen.

________g C		=	= __________* ______= _______
______g H		=	= ____* _____= _____
_______g O		=	=

Empirical Formula is C______ H_______ O_______.

Please fill in the boxes with the correct answers and explain.

 

Answer 1

See my previous answer for explanation.

73.03 g C x 1 mol/12 g = 6.09 moles C

6.13 g H x 1 mol/1 g = 6.13 moles H

20.84 g O x 1 mol/16 g = 1.30 mole O

Dividing by 1.30 we get...

4.68 mol C

4.7 mol H

1.0 mol O

Multiplying all by 3 we get...

14 moles C

14 moles H

3 moles O

Empirical formula = C₁₄H₁₄O₃