Final answer:
To determine how many moles of O2 are required to react with 4.0 moles of C2H6O, we use the balanced chemical equation for the reaction. Two moles of C2H6O react with 7 moles of O2, so 4 moles of C2H6O will therefore require 14 moles of O2.
Step-by-step explanation:
The question is asking how many moles of O2 are required to completely react with 4.0 moles of C2H6O. To find the answer, we need to first write a balanced chemical equation for the reaction. The equation for the combustion of ethanol (which I am assuming is represented by C2H6O here) is:
2 C2H6O + 7 O2 → 4 CO2 + 6 H2O
From the balanced chemical equation, we can see that 2 moles of C2H6O react with 7 moles of O2. Therefore, to react with double the amount, which is 4 moles of C2H6O, we would need double the amount of O2. Hence, 4 moles of C2H6O require 14 moles of O2 to completely react.
Answer: d. 6.0 moles of O2 are required to completely react with 4.0 moles of C2H6O.