Answer:
133.33 g/mole
Explanation:
To get the molar mass, you will need to first determine the atoms in the compound.
AlCl₃
We have aluminum (Al) and Chlorine (Cl)
Next step is to determine how many atoms of each element you have in the compound. The subscript will tell you how many. If you see no subscript, that means 1 atom.
Al = 1 atom
Cl = 3 atoms
Then you multiply the number of atoms by the atomic weight to get the molar mass of each element and add them up to get the total molar mass of the compound:
Element # of atoms atomic weight molar mass
Al 1 x 26.98 g/mole = 26.98 g/mole
Cl 3 x 35.45 g/mole = 106.35 g/mole
TOTAL = 133.33 g/mole
