Which statement based on the mole concept is NOT correct?

Question

A). The molar mass of a diatomic element is its atomic weight times two.

B). The number of atoms in one mole of platinum is the same as the number of atoms in one mole of uranium.

C). One mole of sodium chloride, NaCl contains the same number of ions as one mole of calcium sulfate, CaSO4

D). One mole of methane, CH4 contains the same number of atoms as one mole of carbon dioxide, CO2.

E). One mole of bromine, Br2, contains the same number of molecules as one mole of propane, C3H8.

I am having trouble with my homework. If you can help me out, that would be grate! THANKS!!!

Answer 1

D is NOT correct, CH4 contains 5 and CO2 contains 3

C is correct, Na-Cl+ has 2 ions and Ca-(SO4)+ has 2 ions

Answer 2

A) True: 1 atom = atomic mass, 2 atoms = 2 x atomic mass

B) True: 1 mole = 6.022 x 10^23, doesn't matter what it is.

C) True:  NaCl has 1 Na ion and 1 Cl ion, CaSO4 has 1 Ca ion and one SO4 (sulfate) ion.

D) False: 1 mole of CH4 has 5 moles of individual atoms, 1 mole of CO2 has 3 moles of individual atoms.

E) True: Br2 is one molecule, C3H8 is one molecule.

Answer 3

I think C is not true because one mole of atoms or molecules will be the same, but that's not true for ions.