Question

find total no.of nucleons present in 12g of c-12 atoms

Answer 1

Moles of carbon = mass ÷ molecular mass

Moles = 12 ÷ 12
Moles = 1

So 1 mole have 6 proton and 6 neutrons = 12

No of particles = moles × avagadro number

= 12 × 6.02 × 10 ^ 23
= 72.24×10^23
=7.224×10^24

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Answer 2

protons and neutrons collectively r called nucleons since they reside in nucleus....now we know that one atom of carbon contains 6 protons and 6 neutrons that is 12 nucleons.....now u r asking about the no of nucleons in 12g of carbon not in 12amu of carbon that is mass of single carbon atom....now the mass given is 12g that is fortunately the molar mass of C not the atomic mass and molar mass of any substance contains avogadro number of particles that is 6.02×10^23 particles so we now have 6.02×10^23 atoms of carbon....1 atom of carbon contains 12 nucleons....6.02×10^23 atoms of carbon will contain 6.02×10^23×12=7.224×10^24 nucleons....