Answer:
4
General Formulas and Concepts:
Chemistry
- Identifying Moles/Atoms and Compounds
Step-by-step explanation:
Step 1: Define
Al₂(SO₃)₃ - Aluminum Sulfide
2Al₂(SO₃)₃
Step 2: Identify
In Aluminum Sulfide, we have 2 Al's for every 3 SO₃²⁻'s.
So far, we have 2 Al's in total.
BUT, since we have a 2 coefficient in 2Al₂(SO₃)₃, we need to multiply by 2.
Therefore, we have 4 Al's in total.