How many moles will there be 3.01 · 10²² of particles of any substance?

There are various formulas for finding the amount of a substance.
Under the conditions of this problem, the following is useful to us: ν = N / Na, where N is the number of particles of a given substance, and Na is Avogadro’s number, which shows how many particles 1 mole of any substance contains and equals 6.02 * 10 ^ 23 (1 / mole)
Substituting the known values and calculate: ν = (3.01 * 10 ^ 22) / (6.02 * 10 ^ 23) = 0.5 * 10 ^ -1 = 0.5 / 10 = 0.05 mol