Question

calculate the number of particles in: (i)11 gram of CO2 ,(ii)35.5 gram of Na atoms,(iii)0.2 mole of C12 atoms.​

Answer 1

Answer:

no. of moles = mass given / molar mass

(i) no. of moles of 11 gram of CO2 = 11/44=1/4

= 0.25

(ii) no. of moles in 35.5 gram of Na atoms = 35.5/ 11 =3.23

(iii) no. of moles in 0.2 gram of C12 = 0.2 /144

= 0.001389