of a mixture of and gave of with excess . Find the percentage of in the mixture. — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

Let $x$ be mass of $NaCl$. $\frac{x}{58.5} + \frac{1-x}{74.5} = \frac{2.0}{143.5} \approx 0.0139$. <br>$0.0171x + 0.0134 - 0.0134x = 0.0139$. <br>$0.0037x = 0.0005 \Rightarrow x \approx 0.158 \text{ g} \Rightarrow 15.8\%$.