Answer:
2.13 x 10³moles
Explanation:
Given parameters:
Number of molecules in AlF₃ = 1.28 x 10²⁷molecules
Unknown:
Number of moles = ?
Solution:
A mole is a quantitative unit in chemistry used of taking measurements.
A mole of a substance is the amount of that substance that contains the avogadro's number of particles.
The particles can be molecules, atoms, neutrons, protons, electrons or formula units.
Number of moles = [tex]\frac{number of molecules }{Avogadro's number}[/tex]
Number of moles = [tex]\frac{1.28 x 10^{27} }{6.02 x 10^{23} }[/tex] = 2.13 x 10³moles
