Question

neon has an average atomic mass of 20.2 g/mol, whereas argon has an average atomic mass of 40.0 g/mol. How would the number of atoms in a 1.0 mol sample of neon compare to the number of atoms in a 4.0 mol sample of argon

Answer 1

argon sample would have 20.2 divided by 40.0

Answer 2

Answer : The number of atoms in a 4.0 mole sample of argon has greater number of atoms or four times as compared to the number of atoms in a 1.0 mole sample of neon.

Explanation :

As we know that the 1 mole of substance contains $6.022\times 10^{23}$ number of atoms.

As per question,

The 1 mole sample of neon contains $6.022\times 10^{23}$ number of atoms.

And,

As, 1 mole sample of argon contains $6.022\times 10^{23}$ number of atoms

So, 4.0 mole sample of argon contains $4.0\times 6.022\times 10^{23}=24.088\times 10^{23}$ number of atoms

From this we conclude that, the number of atoms in a 4.0 mole sample of argon has greater number of atoms or four times as compared to the number of atoms in a 1.0 mole sample of neon.