(a) How many atoms are there in exactly 12 g of carbon -12 element? (C = 12 u)
(b) What name is given to this number?
(c) What name is given to the amount of substance containing this number of atoms?
(a) 6.022 × 1023 atoms are present in 12g of carbon-12 element.
(b) The name given to this number is Avogadro’s number.
(c) A substance containing 6.022 × 1023 number of atoms is called 1 mole of that substance.
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