Question

which equation satisfies the law of conservation of matter?
a) 4o₂+al→alo₃
b) 4o₂+3al→3alo₃
c) 3o₂+2al→3alo₃
d) 3o₂+2al→2alo₃

Explanation:

Step1: Check Al atoms for Option D

Left: 2 Al; Right: 2×1 = 2 Al (balanced).

Step2: Check O atoms for Option D

Left: 3×2 = 6 O; Right: 2×3 = 6 O (balanced).

Step3: Verify other options

A: Al (1 vs 1), O (8 vs 3) → unbalanced.
B: Al (3 vs 3), O (8 vs 9) → unbalanced.
C: Al (2 vs 3), O (6 vs 9) → unbalanced.

Answer:

D) 3O₂ + 2Al → 2Al₂O₃