Question

Calculate the number of atoms in 120g of calcium and 120g of iron. (D)
Which one has more number of atoms?
(At. mass of Ca = 40 u , Fe= 56 u)

Try making the answer short if possible, please

Answer 1

Answer:

Calcium has more number of atoms

Explanation:

Number of atoms =moles*avagadros number(6.022*10 to the power -23)

Number of moles=given weight by gram atomic weight

number of moles of Ca=120/40=3

Number of atoms=3*6.022*10 to the power-23=18.066*10 to the power -23

number of moles of Iron=120/56=2.1 moles nearly

number of atomes=2.1*6.022*10 to the power-23=12.646*10 to the power -23