Answer to Question #115806 in Organic Chemistry for Lyesha

Question

Number of atoms of oxygen in 24 g of o3?

Answer 1

Solution:

Molar mass of O₃ will be 3×Ar(O) = 3×16 = 48 g/mol.

Moles of O₃ = Mass of O₃ / Molar mass of O₃

Moles of O₃ = (24 g) / (48 g/mol) = 0.5 mol

According to Avogadro's number “Number of units in one mole of any substance is equal to 6.022×10²³”. The units may be electrons, atoms, ions, or molecules.

Therefore,

Number of molecules of O₃ = Avogadro's number × Moles of O₃

Number of molecules of O₃ = (6.022×10²³) × (0.5 mol) = 3.011×10²³ molecules

Number of molecules of O₃ = 3.011×10²³ molecules.

1 molecule of ozone contains 3 O atoms.

Hence, the number of O atoms is thrice the number of ozone molecules.

Number of atoms of oxygen = 3 × Number of molecules of O₃

Number of atoms of oxygen = 3 × (3.011×10²³) = 9.033×10²³ atoms.

Answer: 9.033×10²³ atoms of oxygen in 24 g of O₃.