Mass of a carbon is 2.004*10^-26kg.find out the magnitude of no of atoms in 1g of carbon

Question

Mass of a carbon atom is 2.004*10^-26kg. Find out the magnitude of no. of atoms  in 1 gram of carbon 

Answer 1

As per question,

 

          2.004*10^-26Kg = 1 atom

=>     2.004*10^-26*10^3 gram = 1 atom                (as 1kg = 10^3 gram)

=>     2.004*10^-23 gram =1 atom

=>     1 gram = 1/(2.004*10^-23) atoms

=>     1 gram = 5*10^23 atoms