Equal weights of and are heated in a closed vessel producing and in a mole ratio. If the limiting component is exhausted, find which component and what fraction of it is left over?

Question

Equal weights of  and  are heated in a closed vessel producing  and  in a  mole ratio. If the limiting component is exhausted, find which component and what fraction of it is left over?

Canvas Classes · Accepted Answer

Strategy:
 Use the law of multiple proportions with given stoichiometry. Fix an arbitrary weight for the elements, calculate the moles, and use the  product ratio to determine how many moles of  and  are consumed.

Step 1: Define reactions and stoichiometry
1 mole of  needs 4  and 6 . 
1 mole of  needs 4  and 10 .
For  ratio of products, total atoms needed: 8  and 16 .

Step 2: Find limiting component
Atomic weight ratio .
To react 8  (), we need 16  ().
Since we have equal weights, Oxygen will

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