of a mixture of and is reacted with to produce of gas at STP. The percentage of in the mixture is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

Let mass of $Al$ be $x$. $\text{Moles } H_2 = (3/2)(x/27) + (1)(1-x)/24 = 1.2/22.4 \approx 0.0535$. Solving for $x$ gives approximately $0.4 \text{ g}$, which is 40%.