What is the molecular mass of ozone O3? (Unit = kg/mol
The Correct Answer and Explanation is:
The molecular mass of ozone (O₃) can be calculated by summing the atomic masses of the three oxygen atoms in the molecule.
Step 1: Atomic mass of oxygen
The atomic mass of oxygen (O) is approximately 16.00 atomic mass units (amu) or 16.00 g/mol.
Step 2: Molecular mass of O₃
Since ozone (O₃) contains three oxygen atoms, we multiply the atomic mass of oxygen by 3:Molecular mass of O₃=3×16.00 g/mol=48.00 g/mol\text{Molecular mass of O₃} = 3 \times 16.00 \, \text{g/mol} = 48.00 \, \text{g/mol}Molecular mass of O₃=3×16.00g/mol=48.00g/mol
Step 3: Conversion to kilograms per mole
To convert from grams per mole to kilograms per mole, we divide the result by 1000 (since there are 1000 grams in a kilogram):48.00 g/mol=48.00×10−3 kg/mol=0.048 kg/mol48.00 \, \text{g/mol} = 48.00 \times 10^{-3} \, \text{kg/mol} = 0.048 \, \text{kg/mol}48.00g/mol=48.00×10−3kg/mol=0.048kg/mol
Final Answer:
The molecular mass of ozone (O₃) is 0.048 kg/mol.
Explanation:
Ozone is a molecule made up of three oxygen atoms bound together. It plays an important role in protecting life on Earth by absorbing the majority of the Sun’s harmful ultraviolet radiation in the stratosphere. The molecular mass is a sum of the masses of the constituent atoms, and because oxygen has a known atomic mass of 16.00 amu, calculating the molecular mass of O₃ becomes a straightforward process of multiplying the atomic mass by the number of atoms. The result is given in kilograms per mole, a unit commonly used in chemistry to represent the molar mass of a substance.
