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Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
a) A mole of iron has more atoms.
b) They both have the same mass.
c) A mole of magnesium has more mass.
d) They both have the same number of atoms.

Respuesta :

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: 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 [tex]6.022\times 10^{23}[/tex].

[tex]1mole=6.022\times 10^{23}particles[/tex]

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

Thus 1 mole of magnesium and iron both contains [tex]6.023\times 10^{23}[/tex] particles.

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