Number of Particles: Ne vs O - Is it the Same?

[scientifico]

Homework Statement

Do 5 L of Ne contain the same number of particles contained in 5 L of O ?

2. The attempt at a solution
The book say yes but I know that 5 L of Neon are 4.5 g and 5 L of Oxygen are 7.15 g.
So dividing them for their molecular weight I obtain 0.22 u and 0.44 u that aren't tha same :(
Where do I wrong?

Thank you!

 

[Dickfore]

What kind of particles? If you are referring to atoms, then, according to Avogadro's Law yes, it is true. But, if you consider ²⁰Ne as the most abundant isotope being consisted of 10 protons, 10 electrons and 10 neutrons, then there are 30 particles per atom of neon, while if you consider ¹⁶O as the most abundant isotope of oxygen, then there are 8 protons, 8 electrons and 8 neutrons per atom, i.e. 24 particles per atom. So, in this sense, neon would have more particles in the same volume.

 

[Borek]

O or O₂?

 

[scientifico]

if would be O2 it's right to me but it says O

 

[Borek]

I don't like nonsensical questions. If it contains just O, in a blink it will contain O₂, and the number of "particles" goes down by half.