Question

Consider the reaction 3X + 2Y -> 5C + 4D
With excess Y, how many moles of X are needed to produce 25.00 moles of D?

Answer 1

Answer:

The correct answer is 18.75 moles X.

Explanation:

We first start with the idea that we have 25.00 moles of D. Next, we must look at the relationships in the balanced equation to find that for every 4 moles of D produced, 3 moles of X are reacted (since it is given that there is excess Y and thus X is the limiting reagent). From this, we can do the following calculation:

25.00 moles D * (3 moles X/4 moles D) = 18.75 moles X

Therefore, your answer is 18.75 moles X.

Hope this helps!