Answer:
The answer to your question is 1, 2, 1, 1
Explanation:
Unbalanced chemical reaction
FeSO₄ + CuCl ⇒ Cu₂SO₄ + FeCl₂
Reactants Elements Products
1 Fe 1
1 S 1
1 Cu 2
1 Cl 2
4 O 4
Balanced chemical reaction
FeSO₄ + 2CuCl ⇒ Cu₂SO₄ + FeCl₂
Reactants Elements Products
1 Fe 1
1 S 1
2 Cu 2
2 Cl 2
4 O 4
How old, is the tree, and does this represent any kind of graph?

The fundamental unit among them (not derived) is :
It’s 5211 bc a is 5, B is 2 and D is 1! hope this helps!