Question

How do I find the amount of atoms in 1 Liter H20?

Answer 1

For a start we ASSUME that the temperature is `25` `""^@C`, i.e. we gots LIQUID water......

Explanation:

We then work out the molar quantity....

`(1*Lxx10^3*g*L^-1)/(18.01*g*mol^-1)=55.52*mol`

What is the `mol`? This is Avogadro's number, and is equal to `6.02214xx10^23`; and this quantity of water MOLECULES has a mass of `18.01*g`.

But clearly there are THREE MOLES OF ATOMS (`2xxH+O`) per mole of water, and so we got.....

`166.57*mol` atoms......

And finally we multiply this molar quantity by Avogadro's number....

`166.57*molxx6.02214xx10^23*mol^-1=1.003xx10^26*"atoms"`.

Are you happy with this?

Here I have used the mole as I would any other collective number, 10, dozen, gross, etc. As a number, the mole is unfeasibly large.

Answer 2

Yes Answer is `1.10xx10^26` Atoms

Explanation:

The concept behind the question is " 1 Mole of water contains `6.023xx10^23` water molecules and 1 Mole of water weighs `18g` or `18ml` "

Now we are provided with 1 liter i.e, `1000ml`

Hence number of moles in 1 liter of water is `1000/18=55.55556 mols`

So that total number of molecules is given by `molsxx6.023xx10^23`= `55.55556xx6.023xx10^23`

Since every molecule of water ( `H_2O`) contains 3 atoms(1 oxygen and 2 hydrogen atoms) the total number of atoms in 1 liter
of water is given by `3xx55.55556xx6.023xx10^23`= `1.10xx10^26` Atoms
`color(red)("ENJOY CHEMISTRY")`