Question

Explain the term percentage composition empirical formula and molecular formula

Answer 1

Explanation:

electronic mechanism molecular

Answer 2

Answer:

• percentage composition of an element is the percentage of the mass contributed by the element to the total mass of the compound in which it is present.
• Empirical formula of a compound (generally covalent) represents the simplest ratio of the number of atoms of each element present in the compound.

For example, the ratio of the number of atoms of each element of Glucose ($C_{6}H_{12}O_{6}$) is 1:2:1

Hence, empirical formula of glucose-$CH_{2}O$

• Molecular formula of a substance is the short hand representation of a substance in terms of the symbols and formulae of the elements present and represents the actual number of atoms of each element in the substance (except mixtures).

E.g., Molecular formula of a glucose-$C_{6}H_{12}O_{6}$