Question

calculate the number of moles in the following mass 7.5 Fecalculate the number of moles in the following mass 7.85 fe

Answer 1

atomic mass of Fe is 55

we know, 1 mole = atomic mass (in gram)

55 g of Fe = 1 mole

or, 1 g of Fe = 1/55 mole

or, 7500 g of Fe = 7500/55 mole

similarly in 7850 g of Fe, there is 7850/55 no. of mole.