Answers

2015-01-25T00:29:12+05:30
Number of mole = weight/ atomic weight
                       = 6.4/32
                       = 0.2 mole
1 mole = 6.023*10^23 atom
hence
0.2 mole - 0.2*6.023*10^23 atom
0.2 mole = 1.2046*19^23 atom
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2015-01-26T17:46:34+05:30
Number of moles=weight/atomic weight
      
                        =6.4/32
                         =0.2




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