Question

Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?

Answer 1

Given a mole each for iron and magnesium, the number of atoms of each element is equal. Iron has a greater mass due to its greater molecular weight. The correct statement among the choices is D.

Answer 2

Answer: d) They both have the same number of atoms.

Explanation:

A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by $6.022\times 10^{23}$.

$1mole=6.022\times 10^{23}particles$

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

Thus 1 mole of magnesium and iron both contains $6.023\times 10^{23}$ particles.