Acetylene gas may be produced by carefully adding water to calcium carbide,according to the equation:
CaC₂(s) + 2 H₂O(l) → Ca(OH) ₂(s) + C₂H₂(g)
When a 37 g sample of an impure calcium carbide was treated with excess water,13 g of acetylene gas was produced.If the reaction is essentially 100% efficient,what was the percentage of nonreacting impurity in the carbide sample?

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The Answer of Acetylene gas may be produced by carefully adding water to calcium carbide,according to the equation: CaC₂(s)+ 2 H₂O(l)→ Ca(OH)₂(s)+ C₂H₂(g) When a 37 g sample of an impure calcium carbide was treated with excess water,13 g of acetylene gas was produced.If the reaction is essentially 100% efficient,what was the percentage of nonreacting impurity in the carbide sample? A)86% B)58% C)42% D)35% E)13.5%

Acetylene Gas May Be Produced by Carefully Adding Water to Calcium