Question

1. What is the mass of 105.00 moles of H20?

Answer 1

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

Answer:

1891.575 g.

Explanation:

The molar mass of water = 2 *  1.008 + 15.999 = 18.015 g.

So 105 moles = 1891.575 g.