Which chemical equation is balanced? ⚖️

🇫🇷 French Version

Propane combustion 🔥 Word equation:

Propane + Dioxygen → Carbon dioxide + Water
Chemical equations:
A) C3H8 + O2 → 3CO2 + 4H2O
B) C3H8 + 7O2 → 3CO2 + 4H2O
C) C3H8 + 5O2 → 3CO2 + 4H2O

Hint 💡:
a) Write the calculations if the multiplication does not involve 1.
A red number, or normal number, multiplied by a blue number, or subscript number.
Example 1: 4×2 = 8
Example 2: For 1×4 = 4, you may answer 4.
b) You may use the symbol * instead of the multiplication sign ×.

📊 RESULT:

Next exercise 🔀