For the question(s) that follow, consider the following equation.
2Mg + O₂ → 2MgO
-The number of moles of MgO produced when 0.20 mole of O₂ reacts completely is

Question

Quizplus · Accepted Answer

According to the balanced chemical equation, 1 mole of O₂ reacts with 2 moles of Mg to produce 2 moles of MgO. Therefore, to find the moles of MgO produced when 0.20 mole of O₂ reacts, we need to use stoichiometry.

(0.20 mol O₂) x (2 mol MgO/1 mol O₂) = 0.40 mol MgO

Therefore, the number of moles of MgO produced is 0.40 mole, which corresponds to choice C.

For the Question(s) That Follow, Consider the Following Equation