Q. 0.1 mole of a carbohydrate with empirical formula ${CH}_{2}O$ contains 1 g of hydrogen. What is its molecular formula?
A) $C_{5}H_{10}O_{5}$
B) $C_{6}H_{12}O_{6}$
C) $C_{4}H_{8}O_{4}$
D) $C_{3}H_{6}O_{3}$
Explanation
(a)
$\because 0.1mole\ of\ carbohydrate\ contains = 1\ g\ of\ hydrogen.$
$\therefore 1\ mole\ of\ carbohydrate\ contains = \frac{1}{0.1}\$
= 10 g hydrogen
Hence, its molecular formula = $C_{5}H_{10}O_{5}.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.