Question

help me plzzzzzzzzzzzzzz

Answer 1

Mass of chlorine=35.5
Mass of11. 95 chlorine =11.95×35.5
=424.225
May it help

Answer 2

Atomic masses of C=12g , H=1g, Cl=35g

  1mole of CHCl3 =atomic mass of C+ atomic mass of H+3x atomic mass of Cl

  = 12+1+3(35)

  1mole of CHCl3 = 118g of CHCl3  -------(1)

  1 mole of CHCl3 contain = 3 mole of Cl atoms

  1 mole of CHCl3 contain=6.022 x 1023molecules of CHCl3  

  Since,  1 moleule of CHCl3 contains= 3 atoms of Cl

  So, 1 mole of CHCl3 contain=[6.022 x 1023] x 3 atoms of Cl  ------------(2)

  From (1) and (2),

  118g of CHCl3 contain=  [6.022 x 1023] x 3 atoms of Cl

 

                                    [6.022 x 1023] x 3  

   1g  of CHCl3 contain=  -----------------------   atoms of Cl   

                                             118

                                          [6.022 x 1023] x3x 11.95 

   11.95g of CHCl3 contain = ----------------------------------   atoms of Cl

                                                       118

 

   11.95g of CHCl3 contain = 1.83 x 1023atoms of Cl