Question

How many molecules are in 5.35 moles of `H_2O`?

Answer 1

`3.22×10^24` molecules `H_2O`

Explanation:

Avogadro's number states that every mole has
`6.022⋅10^23` atoms (or molecules, depending on the substance).

So to figure this out you have to assume that `1 mol H_2O = 6.022×10^23`

So set up a conversion.

`5.35mol` `H_2O` (`6.022×10^23` molecules / 1 `mol`)
`1 Mol` cancels out with `mol H_2O`.

`5.35×6.022×10^23=3.22×10^24` molecules of `H_2O`