Calculate the mass of each of the following:
(a) one atom of aluminium.
(b) 3 moles of chlorine ion.
(c) 2.5 mole of NaCl.
(Given that atomic masses of O = 16 u, Na=23 u, Cl= 35.5u, Al= 27u).
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a) Dividing 26.986.02×1023 yields a mass of 4.48×10−23 g for one aluminum atom.
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