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If 3 moles of calcium react with 3 moles of oxygen, then

a. Wich substance is the limiting reactant?
b. How many moles of calcium oxide are formed ?

1 answer

a. Calcium is the limiting reactant because it only has 3 moles compared to the 3 moles of oxygen.

b. According to the balanced chemical equation for the reaction between calcium and oxygen:

2Ca + O2 -> 2CaO

For every 2 moles of calcium that reacts, 2 moles of calcium oxide is formed. Therefore, since there are only 3 moles of calcium, the maximum amount of calcium oxide that can be formed is:

3 moles Ca * (2 moles CaO / 2 moles Ca) = 3 moles CaO

So, 3 moles of calcium oxide are formed.
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