Answer:
[tex]\huge\boxed{\sf 5\ moles\ of\ oxygen}[/tex]
Explanation:
Chemical Reaction:
[tex]C_3H_8+5O_2 \longrightarrow 4H_2O+3CO_2[/tex]
From the reaction, we can say that,
- 1 mole of propane and 5 moles of oxygen produce 4 moles of water and 3 moles of carbon dioxide.
So, to generate 3 mole of carbon dioxide, 5 moles of oxygen are required. (as shown in the chemical reaction!)
[tex]\rule[225]{225}{2}[/tex]
