Which substance is in excess when 6.00 moles of aluminum are reacted with 12.00 moles ofoxygen in the following equation? 4Al + 3O₂ $\rarr$2Al₂O₃

Question

Quizplus · Accepted Answer

According to the balanced chemical equation, 4 moles of aluminum react with 3 moles of oxygen. Therefore, for every 4 moles of aluminum, we need 3 moles of oxygen. In this case, we have 6 moles of aluminum and 12 moles of oxygen. We can see that the oxygen is in excess because we only need 3/4 as many moles of oxygen as we have. Therefore, choice A, aluminum, is the substance in excess.

Which Substance Is in Excess When 6 →\rarr→ 2Al2O3 A)Al B)O2 C)Al2O3

Which Substance Is in Excess When 6 $\rarr$ 2Al₂O₃
A)Al
B)O₂
C)Al₂O₃