Question

calculate the no. of iron atoms in piece of iron weighing 8.4 g​

Answer 1

Atomic mass of Fe= 56amu

thus, molar mass of fe= 56g

by formula,

no. of moles = given mass/molar mass

                     = 8.4/56

                     = 0.15 moles

no. of atoms in 0.15 moles= 0.15 x avagadro's no.

                                             = 0.15 x 6.022 x 10^23

                                             = 9.033 x 10^22 atoms

Hope this helps:)

Answer 2

hope it helps!

#sumedhian ❤❤