Question

Which of the following has the most number of molecules? Give an explanation in your answer!

a) 1 mole of calcium
b) 2 mole of sodium
c) 3 mole of helium
d) 4 mole of Lithium

Answer 1

(i) 1g Au=1971 mol atom of Au

                =1971×6.022×1023 atoms of Au

(ii) 1g Na=231 mol atom of Na

                 =231×6.022×1023 atom of Na

(iii) 1g Li=71 mol atom of Li

                =71×6.022×1023 atom of Li

(iv) 1g Cl2=711 mol molecules of Cl2

                  =711×6.022×1023 molecules of Cl2

                  =712×6.022×1023 atoms of Cl2

Hence, 1g lithium has the largest number of atoms.

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