Question

CHEMISTRY HELP!:
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? (2 points)


A. The argon sample would have the same number of atoms as the neon sample.
B. The argon sample would have twice as many atoms as the neon sample.
C. The argon sample would have four times as many atoms as the neon sample.
D. The argon sample would have eight times as many atoms as the neon sample.

Answer 1

1 mol of anything has 6.02 * 10^23 items.
4 mol has 4 times as much
C: Answer <<<<< =========

Answer 2

Answer: C. The argon sample would have four times as many atoms as the neon sample.

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

1 mole of neon $Ne$ contains=$6.022\times 10^{23$ atoms

1 mole of argon $Ar$ contains=$6.022\times 10^{23$  atoms

Thus 4 moles of argon $Ar$ contains=$\frac{6.022\times 10^{23}}{1}\times 4=24.09\times 10^{23}$  atoms

Thus the argon sample would have four times as many atoms as the neon sample.