Question

Calculate the number of particle of each . 1- 112 gram of fe atom. (2)- 69 gram of na atom . (3).- 80 gram of ca atom . (4)- 36 gram of h2o molecule

Answer 1

1 mole = 6.023×10^23 particles

Find number of moles present in each:

Fe = 112g/56g = 2 moles

Then number of particles

1 mole = 6.023×10^23

2 moles = ?

6.023×10^23 x 2 = 1.204×10^23 particles