Question

Given the incomplete equation 4Al + 3O2 → 2X, what compound is X?

Answer 1

Answer;

B) Al2O3

Explanation;

Aluminium reacts with oxygen to form aluminium oxide.

The chemical reaction for the reaction between Aluminium and Oxygen is;

4Al+ 3O₂→ 2Al₂O₃

Therefore;

Compound X is Aluminium oxide (Al₂O₃)

Answer 2

Answer: The correct answer is Option B.

Explanation:

When aluminium metal reacts with air, it produces an oxide named as aluminium oxide. The chemical formula for this compound is $Al_2O_3$

The balanced chemical equation for the above reaction follows:

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s)$

By Stoichiometry of the reaction:

4 moles of aluminium metal reacts with 3 moles of oxygen to produce 2 moles of aluminium oxide.

This reaction is a type of synthesis reaction because substances are reacting in their elemental state to produce one compound.

Hence, the correct answer is Option B.