What is the molecular weight of Heavy Water?

What is the molecular weight of Heavy Water?

1. A. 22
2. B. 20
3. C. 18
4. D. 16

Answer: B. 20

The molecular weight of heavy water, also known as deuterium oxide (D2O), is approximately 20.0276 g/mol.

Here’s how you can calculate it:

1. Atomic mass of deuterium (D): 2.0141 g/mol
2. Atomic mass of oxygen (O): 16.0000 g/mol
3. Molecular formula of heavy water: D2O
4. Molecular weight: 2 * 2.0141 g/mol (for two deuterium atoms) + 16.0000 g/mol (for one oxygen atom) = 20.0276 g/mol

Therefore, the molecular weight of heavy water is approximately 20.0276 g/mol.