what is the total number of moles of na₂s produced when 8.0 moles of na were completely consumed? 2na + s…
what is the total number of moles of na₂s produced when 8.0 moles of na were completely consumed? 2na + s -->na₂s
Answer
Answer:
D. 4
Explanation:
Step1: Identify mole - ratio
From the balanced equation $2Na + S\rightarrow Na_2S$, the mole - ratio of $Na$ to $Na_2S$ is 2:1.
Step2: Set up proportion
Let $x$ be the moles of $Na_2S$ produced. We have the proportion $\frac{2\ mol\ Na}{1\ mol\ Na_2S}=\frac{8.0\ mol\ Na}{x}$.
Step3: Solve for $x$
Cross - multiply: $2x = 8.0\times1$. Then $x=\frac{8.0}{2}=4.0$ moles.