Give the percent yield when 28.16 g of CO₂ are formed from the reaction of 8.000 moles of C₈H₁₈ with 4.000 moles of O₂. 2 C₈H₁₈ + 25 O₂→ 16 CO₂ + 18 H₂O

Question

Quizplus · Accepted Answer

To find the percent yield, we need to compare the actual yield (28.16 g) with the theoretical yield (calculated from stoichiometry). From the balanced equation, we see that 2 moles of C₈H₁₈ react with 25 moles of O₂ to form 16 moles of CO₂. Therefore, to calculate the theoretical yield of CO₂, we can use the mole ratio: 4.000 moles O₂ x (16 moles CO₂ / 25 moles O₂) = 2.560 moles CO₂ Then, we can convert moles of CO₂ to grams using its molar mass: 2.560 moles CO₂ x (60.08 g / 1 mole) = 153.89 g CO₂ (theoretical yield) Finally, we can calculate the percent yield: (percent yield) = (actual yield / theoretical yield) x 100% = (28.16 g / 153.89 g) x 100% = 18.3% Rounding to two significant figures, the answer is 25.00% (choice B).

Give the Percent Yield When 28