Answer:
To burn 1 molecule of C3H8 we need 5 molecules of O2.
Explanation:
Step 1: Data given
Burning C3H8 means adding O2
C3H8 + O2
The products will be CO2 and H2O
Number of molecules of C3H8 = 1 molecule
Step 2: The balanced equation
C3H8 + 5O2 → 3CO2 + 4H2O
Step 3: Calculate number of molecules O2 needed
For 1 mol C3H8 we need 5 moles of O2 to produce 3 moles of CO2 and 4 moles H2O
To burn 1 molecule of C3H8 we need 5 molecules of O2.
