Question

How many atoms are there in 5.70 mol of hafnium? A) 1.06x10^23, B) 3.43x10^23,C)3.43x10^24D)1.06x10^22, or 6.02x10^23?

Answer 1

no.of atoms=no.of mol*Na

Answer 2

no. of atoms=5.70*6.022*10^23

Answer 3

In 5.70 mol of Hafnium there are 34,326 208 203*10^23 atoms.

Answer 4

so approximate answer is option b) 3.43x10^23