Test Index

WAEC Chemistry 2014 Paper

Question : 40

Total: 45

Solution:

Concept:

The empirical formula shows the simplest whole-number ratio of atoms in a compound.

Explanation:

Ethanoic acid has the molecular formula

\mathrm{C_2H_4O_2}

Divide each subscript by the highest common factor, which is 2.

This gives

\mathrm{C_2H_4O_2} \div 2 = \mathrm{CH_2O}

So the empirical formula of ethanoic acid is

\mathrm{CH_2O}

Other options do not match this ratio.

Answer:

D. Ethanoic acid

Go to Question:

Prev Question

Next Question