Question

How many atoms are contained in one mole of sucrose?

Answer 1

Sucrose:

• It is formed by condensation of the reducing carbon atoms of glucose (${\mathrm{C}}_1–\mathrm{\alpha }$) and fructose (${\mathrm{C}}_2-\mathrm{\beta }$).
• The molecular formula of sucrose is ${\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}.$
• Number of atoms in one molecule of sucrose = $12+22+11=45$

1 mole of sucrose contains $6.023\times {10}^{23}$ molecules

∵ 1 molecule of sucrose has 45 atoms

∴ $6.023\times {10}^{23}$ molecule of sucrose has $45\times 6.023\times {10}^{23}$ atoms/mole.

Hence, the total number of atoms in one mole of sucrose is $2.71\times {10}^{25}$.