How many molecules are in 1 mole of OsO4? Thanks!

6.02.10²³ molecules

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

1 mole of OsO₄

Number of molecules (N) :

i just learnt this recently but i need to look through my notes again