Some Basic Concepts of Chemistry · Class 11 · CBSE · Science Chemistry

An organic compound contains 40% Carbon, 6.67% Hydrogen, and 53.33% Oxygen by mass. What is its empirical formula?

Practice question from Some Basic Concepts of Chemistry (Class 11 · CBSE · Science Chemistry), with the correct answer and a step-by-step solution.

medium · MCQ · Q-048A2D

An organic compound contains 40%40\% Carbon, 6.67%6.67\% Hydrogen, and 53.33%53.33\% Oxygen by mass. What is its empirical formula?

  1. A.CH2OCH_2OCorrect answer
  2. B.C2H4O2C_2H_4O_2
  3. C.CHOCHO
  4. D.CH3OCH_3O

Solution

Moles of C =40/12=3.33= 40 / 12 = 3.33. Moles of H =6.67/1=6.67= 6.67 / 1 = 6.67. Moles of O =53.33/16=3.33= 53.33 / 16 = 3.33. Dividing by the smallest value (3.333.33), the atomic ratio C:H:O is 1:2:11:2:1. Thus, the empirical formula is CH2OCH_2O.

More from Some Basic Concepts of Chemistry

All of Some Basic Concepts of Chemistry

Practise more Chemistry

Sign up free for adaptive practice on this chapter, with instant feedback and hints on every question.

Start practising free

Free to start · No credit card needed