In the reaction , how many grams of (at. wt. 27) are required to produce of at STP? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
In the reaction $2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2$, how many grams of $Al$ (at. wt. 27) are required to produce $33.6\text{ L}$ of $H_2$ at STP?
Answer: 27
💡 Solution & Explanation
$\text{moles } H_2 = 33.6 / 22.4 = 1.5\text{ mol}$. <br>Ratio $Al : H_2 = 2:3$. <br>$\text{moles } Al = (2/3) \times 1.5 = 1.0\text{ mol}$. <br>$\text{Mass } Al = 1.0 \times 27 = 27\text{ g}$.
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