Question

is it true that a mole of oxygen O2 and a mole of phosphorus,P4 do not contain the same number of molecules

Answer 1

Answer: They have same number of molecules

Explanation: 1 mole of oxygen O2 contains Avagadro number(6.023×10^23) particles(atoms/molecules/ions..)

1 mole of phosphorus P4 contains Avagadro number(6.023×10^23) particles(atoms/molecules/ions..)

But they don't contain same number of atoms...

Answer 2

No, a mole of oxygen and a mole of phosphorus, P4 contain the same number of molecules.

• We know that one mole of any gas or compound contains $6.023×10^{23}$ number of molecules.
• Thus one mole of oxygen gas contains $6.023×10^{23}$ number of molecules.
• Again one mole of phosphorus or $P_4$ contains $6.023×10^{23}$ number of molecules.
• So, we can say that a mole of oxygen and a mole of phosphorus, P4 contain the same number of molecules.