Question

How many moles of oxygen (O) atoms are in a sample of 3.98 × 1023 atoms?

Answer 1

3.88 x 10^23 /6.022 x 10^23 = 0.6609099967 moles

Answer 2

Answer : The number of moles of oxygen atoms present in a sample is 0.661 moles.

Explanation :

As we know that,

1 mole of substance contains
`6.022* 10^(23)` number of atoms.

As we are given that:

Number of oxygen atoms =
`3.98* 10^(23)`

Now we have to determine the moles of oxygen atoms.

As,
`6.022* 10^(23)` atoms of oxygen present in 1 mole of oxygen

So,
`3.98* 10^(23)` atoms of oxygen present in
`(3.98* 10^(23))/(6.022* 10^(23))=0.661` mole of oxygen

Therefore, the number of moles of oxygen atoms present in a sample is 0.661 moles.