Question

An organic compound contains x% of carbon, y% of hydrogen and the remaining of oxygen. The molecular weight of the compound is given. What sequence of steps is followed for the calculation of molecular formula of the organic compound?
(a) Calculation of empirical formula weight
(b) Calculation of simplest ratio of dividing
(c) Calculation of atomic ratio by dividing the percentages
(d) Multiplying the empirical formula by the ratio of molecular weight and empirical formula weight

• A. b a c d
• B. c b a d
• C. b a d c
• D. d c b a

Answer 1

Answer: (B)

c b a d

Steps for the calculation of molecular formula are as follows:

c) Calculation of atomic ratios by dividing the percentages

b) Calculation of simplest ratio by dividing

a) Calculation of empirical formula weight

d) Multiplying the empirical formula by the ratio of molecular weight and empirical formula weight.