In the given reaction,
$X+Y+3 Z \leftrightarrows X YZ_{3}$
if one mole of each of $X$ and $Y$ with $0.05 \mathrm{~mol}$ of $Z$ gives compound $X Y Z_{3}$. (Given : Atomic masses of $X, Y$ and $Z$ are 10, 20 and 30 amu, respectively.) The yield of $X YZ_{3}$ is _____________ g. (Nearest integer)
Answer (integer)
2
Solution
$\underset{n_{\text {moles }}=1}{X}+\underset{1}{Y}+\underset{0.05}{3 Z} \rightleftharpoons X Y Z_{3}$
<br/><br/>
Limiting reagent is $Z=\frac{0.05}{3}=.016$
<br/><br/>
3 moles of $Z \rightarrow 1$ mole of $X Y Z_{3}$
<br/><br/>
$0.05$ mole of $Z \rightarrow \frac{1}{3} \times 0.05$ mole of $X Y Z_{3}$
<br/><br/>
M.wt. of $\mathrm{XYZ}_{3}=10+20+90$
<br/><br/>
$=120\, \mathrm{amu}$
<br/><br/>
Wt. of $X Y Z_{3}=\frac{.05}{3} \times 120$
<br/><br/>
$=2 \mathrm{~g}$
About this question
Subject: Chemistry · Chapter: Some Basic Concepts of Chemistry · Topic: Mole Concept
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