Question

Total number of neutrons in five moles of water molecule is

Answer 1

Each water molecule has 8 neutron (hydrogen has no neutron)
So numbers of neutrons in 5 moles of water = 5 ×avogadro number ×8

Answer 2

Answer:

Well, how many neutrons in A SINGLE H2O molecule..........?

Explanation:

To a first approximation we have a single molecule of 1H162O. (The left hand superscripts, as always, refer to the nuclear mass, the isotope. Of course there are some different (so-called) isotopomers, but we really don't have to worry about them given their abundance.)

So for 16O there are 8 neutrons, and for 1H there are NO neutrons. If you don't know how I knew this I would review your knowledge of isotopes.......

So we know the number of neutrons of in one molecule molecule, we just multiply this number out by the molar quantity:

Number of neutrons = 8 neutrons×NA×5, where NA=the Avocado Number........

And when you do this problem, can you calculate how neutrons in the same quantity of D2O, where D=2H? D2O is often used in a laboratory.