Question

Statement: Terms percentage composition, empirical formula and molecular formula are same.

State whether the given statement is true or false.

• A. True
• B. False

Answer 1

The correct option is B False

$\text{Percent composition}$ is the per cent by mass of each element present in a compound.

Example water, $H_{2}O$, 1 mole of water is 18.0152 grams. In that compound, there are two moles of H atoms i.e. $2\times$ 1.008 = 2.016 grams and one mole of O atoms

The $\text{empirical formula}$ of a chemical compound is the simplest positive integer ratio of atoms present in a compound. It represents the simplest whole-number ratio of all the atoms in a molecule. example of glucose

The molecular formula indicates the exact number of atoms in the molecule.

A chemical formula that gives the total number of atoms of each element in each molecule of a substance is its $\text{molecular formula}$.

For example, the molecular formula for glucose is $C_6{H}_{12}{O}_6$ and empirical formula is $C{H}_{2}O$ and per cent composition of H is 12 mols of H atoms are present in 1 mol of glucose.

Hence, the given statement is $\text{false}$