1 mol of any substance (atoms, molecules...)=6.02210²³ particles (atoms, molecules....)
we calculate the number of representative particles in 0.00856 mol of NaCl.
1 mol---------------------------------6.02210²³ particles.
0.00856 moles-------------------- x
x=(0.00856 mol 6.02210²³ particles) / 1 mol≈5.154810²¹ particles.
we have 1.154810²¹ particles in 0.00856 mol NaCl.
