Question

A mole of sulphur trioxide molecule contains how many oxygen atoms?

Answer 1

Hint: The answer here is based on the fact about the naming of the chemical compounds based on the number of atoms present and multiplying this value by the Avogadro number which gives the required answer.

Complete answer:
In the previous classes of chemistry, we have studied the basic concepts which tell about the naming of the given compounds based on their number of atoms and also based on their formula.
Let us now see the chemical formula of the compound given and then find out the total number of oxygen atoms present in it.
- Sulphur trioxide has a relatively narrow liquid range and in the gaseous form this chemical is a significant pollutant.
- This chemical has molecular mass of 80.06 g/mol where it has the trigonal planar with symmetric charge distribution around the central atom.
- Sulphur trioxide is polar in nature and is having the chemical formula as per its name as $S{O}_3$.
Hence we can say that there are three oxygen atoms and one sulphur atom in this compound.
Now, we shall multiply this value by the Avogadro number of molecules that is,
$$3\times 6.022\times {10}^{23}mo{l}^{-1}=18.066\times {10}^{23}mo{l}^{-1}$$
Therefore, the correct answer is that one mole of sulphur trioxide contains$18.066\times {10}^{23}$ molecules of oxygen or in other words this chemical has $18.066\times {10}^{23}$atoms of oxygen.

Note:
Note that this chemical compound that is sulphur trioxide is a significant pollutant which is the primary precursor to acid rain. This chemical also acts as the precursor to sulphuric acid and is known as sulphuric anhydride .