Question 455 of 513

Balance: P4 + O2 → P2O5

  • P4 + O2 → 2P2O5
  • 4P + 5O2 → 2P2O5
  • P4 + 5O2 → 2P2O5
  • P4 + 3O2 → 2P2O3

Correct Answer: C

Explanation
To balance, 4P atoms need 2P2O5. That gives 10 oxygen atoms, so add 5O2. Final: P4 + 5O2 → 2P2O5.
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