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Answer:

The meaning and usefulness of the mole Page 2 2 • One mole of NaCl contains 6.022 x 1023 NaCl formula units. Use the mole quantity to count formulas by weighing them. The mass of an atom in amu is numerically the same as the mass of one mole of atoms of the element in grams.

Explanation:

Formula Units = mole x Avogadro's Number

Formula Units of NaCl = mole NaCl x Avogadro's Number

Formula Units of NaCl = 0,25 mole x 6,022 x 10²³ molecule

Formula Units of NaCl = 1,5055 x 10²³ molecule

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