Question

calculate the H atom C atom in 7mg of 3C5H5?​

Answer 1

Explanation:

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:

      =147×10−3×6.02×1023×8

     

      =2.408×1021 neutrons

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

=2.4088×1021×1.675×10−27

=4.035×10−6  kg.