Answer:
The correct answer is 229.5 g
Step-by-step explanation:
The atomic mass of Aluminium (Al) is 27
atomic mass of Chlorine (Cl) is 35.5
the atomic mass of oxygen is 16
Hence, the molar mass is the addition of the masses all the atoms present in the compound.
It should be noted that the number outside the bracket only affects the atoms in the bracket.
Al = 27 × 1 = 27 g
Cl = 35.5 × 3 = 106.5 g
O = 16 × 2 × 3 = 96 g
Molar mass of Al(ClO₂)₃ is 27 + 106.5 + 96 = 229.5 g