Answer:
P ₄+ 5 O ₂→ P₄O₁₀
Step-by-step explanation:
You need to make sure that both sides of the equation have the same number of molecules. In this equation, oxygen is not balanced. Since on the right side, we have 10 oxygen and on the left, we only have 2. Then, we need to time by 5 to make it 10.