For the reaction , 10 g and 10 g react. Which is/are correct? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Moles } H_2 = 5$; $\text{Moles } O_2 = 0.3125$. <br>Ratio $2:1$. $0.3125 \text{ mol } O_2$ needs $0.625 \text{ mol } H_2$. <br>$O_2$ is limiting. $\text{Moles } H_2O = 0.625 \Rightarrow \text{mass} = 11.25 \text{ g}$. <br>$\text{Unreacted } H_2 = 5 - 0.625 = 4.375 \text{ mol} = 8.75 \text{ g}$.