Question

question papers of commerce. +1​

Answer 1

Answer: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.

Explanation:

Answer 2

Here in attachment:-

Commerce paper inclues accounts as well...if u need it let me know i ll edit!