Question

Determine the number of formula units present in a 3.7 mole sample of CuBr

Answer 1

1 mole contains $6.02\cdot10^{23}$ formula units (Avogadro's number). Therefore, 3.7 moles contain

$3.7\times6.02\cdot10^{23}=2.2\cdot10^{24}$ formula units.

Answer: $2.2\cdot10^{24}$