Question #9885a

1 Answer
David Drayer
Aug 10, 2017

18 grams

Explanation:

6.02 xx 10^23 molecules equal a mole of molecules.

H_2O water has a molar mass of 18 grams

2 xx H = 2 xx 1 = 2 grams for Hydrogen

1 xx O = 1 xx 16 = 16 grams for Oxygen

2 + 16 = 18 grams total for Water H_2O

A mole of water has a mass of 18 grams. so Avogardo's number of molecules = a mole = 18 grams.

Related questions
See all questions in The Mole
Impact of this question
1333 views around the world
You can reuse this answer
Creative Commons License