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Which statement concerning the mole is not correct? a. A mole of a diatomic element contains 2 x N_A moles of atoms of the element. b. A mole of any compound contains one mole of each kind of atom found in that compound. c. The molar mass of any compound is equal to its molecular weight in grams. d. A mole of metal contains N_A atoms of that metal. e. All of these statements are correct.