4.5 × 1025 atoms of nickel equal how many moles? a. 27 mol b. 2.7 × 1048 mol c. 0.75 mol d. 75 mol

75 mol

Explanation:

The number of atoms in a mole of substance is 6.023X10²³ [Avagadro's number]

if the given sample of nickel contains 4.5X10²⁵ atoms it means the moles are

moles =

moles =

If we round of the given answer the number of moles = 75 moles

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.