What is the molar mass of water?

1 Answer
anor277
Jun 18, 2017

A water molecule contains 3 "atoms". These 3 "atoms" constitute 1 "water molecule".

Explanation:

A "water molecule" contains 3 "atoms": 2xxH, and 1xxO. That is, those 3 atoms, when appropriately chemically bound, constitute a water molecule.

We know that 18.01*g of water contains N_A water molecules, where N_A="Avogadro's number"=6.022xx10^23*mol^-1, and we get the mass by adding the atomic masses appropriately, i.e. (2xx1.00794+15.999)*g*mol^-1.

How many atoms in an 18*g mass of water?

Related questions
See all questions in The Mole
Impact of this question
1617 views around the world
You can reuse this answer
Creative Commons License