Answer
(a) No. The molecular formulas are different, so the mass of one mole of molecules (the molar
mass) is different.
(b) Yes. One mole of any kind of molecules contains Avogadro’s number of molecules.
(c) No. This is for the same reason given in (a).
(d) No. The formulas are different, so there are different numbers of atoms per molecule and,
hence, different total numbers of atoms in equal numbers of molecules.
Work Step by Step
(a) No. The molecular formulas are different, so the mass of one mole of molecules (the molar
mass) is different.
(b) Yes. One mole of any kind of molecules contains Avogadro’s number of molecules.
(c) No. This is for the same reason given in (a).
(d) No. The formulas are different, so there are different numbers of atoms per molecule and,
hence, different total numbers of atoms in equal numbers of molecules.
