0.450 kg of octane burned during combustion produces 1.25 kg of carbon dioxide. what is the percent yield?

The percent yield is 90%

Explanation:

First, we write the combustion reaction.

→

Then we balanced the equation.

2 →

Now, we calculate the moles of octane.

n(octane)=

Now we find the theoretical moles of C02, taking into account stoichiometric coefficients

Finally, we calculate the mass of CO2 and proceed to calculate the percent yield

the percent yield is 89,92%≈90%