Question

How many moles of Oxygen atoms are in a sample of 3.98 x 10^23 atoms?

Answer 1

`1mol\ \ \ \ \rightarrow \ \ \ 6,02*10^(23)\\ x \ \ \ \ \ \ \ \ \ \rightarrow \ \ \ 3,98*10^(23)\\\\ x=(3,98*10^(23)*1mol)/(6,02*10^(23))\approx0,66mol`

Answer 2

Step-by-step explanation:

As per the mole concept, there are
`6.022 * 10^(23) atoms` present in 1 mole of a substance.

Mathematically, 1 mole =
`6.022 * 10^(23)` atoms or molecules

Therefore, number of moles of oxygen atoms present in
`3.98 * 10^(23)` atoms are calculated as follows.

`(3.98 * 10^(23) atoms)/(6.022 * 10^(23)atoms/mol)`

= 0.66 mol

Thus, we can conclude that there are 0.66 moles of oxygen atoms are in a sample of
`3.98 * 10^(23) atoms`.