Molar mass of water is:
Correct answer: A. 0.018 kg/mol
- A. 0.018 kg/mol
- B. 0.108 kg/mol
- C. 0.027 kg/mol
- D. 0.0635 kg/mol
Explanation
The average mass of one H2O molecule is 18.02 amu. The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of one mole of H2O is 18.02 grams. This is stated: the molar mass of water is 18.02 g/mol or 0.018kg/mol.
Last updated