Question

Find the total number of nucleons present in 12gm of c-12atoms

Answer 1

No of moles of carbon atoms = 12 g/12g/mole = 1 mole  
We know that, Number of atoms = number of moles x Avogadro number 
= 1 x 6.022 x 1023 = 6.022 x 1023   In 1 atom of carbon there are 6 protons and 6 neutrons = 12 nucleons.
The number of nucleons = 6.022 x 1023 x 12
= 7.2264 x 1024