how many are contain in 2kg ? Mass of one neutron 1.67 x10^-27kg.

1 thought on “how many are contain in 2kg ? Mass of one neutron 1.67 x10^-27kg.”

1. Answer:

   Explanation:

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   The number of neutrons is equal to the difference in the mass number and atomic number.
   

   It is equal to 14−6=8.
   

   
   

   (a) The number of neutrons present in 7 mg of C-14:
   

   =

   14
   

   7×10

   −3
   

   ​

   ×6.02×10

   23
   

   ×8
   

   =2.408×10

   21
   

   neutrons
   

   
   

   (b) Total mass of neutrons in 7 mg of C-14:

   =2.4088×10

   21
   

   ×1.675×10

   −27
   

   
   

   =4.035×10

   −6
   

   kg.

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