Question

One mole of oxygen corresponds to \[6.022 \times {10^{23}}\] oxygen atoms.
A.True
B.False

Answer 1

Hint: To solve this question, follow these steps: first write down the number of moles of the gas present. Then multiply the number of moles with Avogadro’s number to find the number of molecules. Then multiply this quantity with the number of atoms present in a molecule.

Complete step by step answer:
Before we move forward with the solution of this question, let us discuss some important concepts.
Mole: a mole is a physical quantity which represents the amount of mass of the substance required to have a collective of \[6.022 \times {10^{23}}\] atoms of the given substance. Mole is a widely used unit for calculating the amount of matter of a substance. One mole of any substance weighs about the same as the molecular mass of that substance.
The atomic number of oxygen is 8, hence the electronic configuration of oxygen can be given as \[[He]2{s^2}2{p^4}\] . This means that there are 6 electrons present in the valence shell. Hence, the oxygen atom is short of just 2 electrons to form a stable octet. In order to satisfy its octet, the oxygen atom combines with itself to form diatomic molecules.
Now moving back to the question, we have been given 1 mole of oxygen. This means that there are \[6.022 \times {10^{23}}\] oxygen molecules present in the given sample. In order to calculate the number of atoms of oxygen present, we can use the following formula:
Number of atoms = (number of molecules) (number of atoms in every molecule
  = \[(6.02 \times {10^{23}})\] (2)
  = \[12.04 \times {10^{23}}\] atoms
Hence, the given statement is false.

Hence, Option B is the correct option.

Note:
Many a times, an element exists in its monatomic form, and hence such a situation where one mole of a given element has more atoms than the Avogadro’s Number seldom occurs.