Question

How many molecules of hydrogen is in water

Answer 1

See below

Step-by-step explanation:

Water formula is H2 O this shows there are two ATOMS of hydrogen in water ...... depending on where you look , a MOLECULE is two or more atoms , Hydrogen in raw , free standing form is diatomic...it is a molecule of H2

so I would say there is ONE MOLECULE of hydrogen in each water molecule

Answer 2

Answer is 2 hydrogen molecules and 1 oxygen, thus H2 O

Explained
The water molecule is composed of two hydrogen atoms, each linked by a single chemical bond to an oxygen atom.

See picture attached