You really need to be more careful with yur typing. The reaction you have has CO2 on both sides. I'm sure you meant 5O2 on the left and not 5CO2. The same applies to your other posts, also.
I think the answer is 31.9 g O2 but the difference may be in what we used as the molar mass C3H8. I used 44.097. If I use 44 g for the molar mass C3H8 I get 32.0 also.
For the reaction C3H8+5CO2=3CO2+4H2O
How many grams of O2 react with 8.80grams of C3H8? I think the ans is 32.0gO2
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