In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is true?
a. the mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon.
b. there are more atoms in 1 mole of magnesium than in 1 mole of carbon.
c. the mass of 1 mole of carbon is greater than the mass of 1 mole of magnesium.
d. the mass of 1 mole of carbon is the same as the mass of 1 mole of magnesium.
e. none of the above

A

Explanation:

A) The molecular mass of a compound is the atomic mass of this compound but in grams, we know that the magnesium has an atomic mass of 24 u and the carbon has and atomic mass of 12 u, so the molecular mass of magnesium is 24g and the molecular mass of carbon is 12g, so a mole of magnesium has a greater mass.

B) A mole of any given substance is the avogadro number, 6.023 10^23 molecules, so a mole of magnesium and a mole of carbon has the same amount of atoms.

C) The molecular mass of a compound is the atomic mass of this compound but in grams, we know that the magnesium has an atomic mass of 24 u and the carbon has and atomic mass of 12 u, so the molecular mass of magnesium is 24g and the molecular mass of carbon is 12g, so a mole of magnesium has a greater mass.

D) The molecular mass of a compound is the atomic mass of this compound but in grams, we know that the magnesium has an atomic mass of 24 u and the carbon has and atomic mass of 12 u, so the molecular mass of magnesium is 24g and the molecular mass of carbon is 12g, so a mole of magnesium has a greater mass.

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