States of Matter - Result Question 82
####83. Calculate the volume occupied by $5.0 g$ of acetylene gas at $50^{\circ} C$ and $740 mm$ pressure.
(1991, 2M)
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Answer:
Correct Answer: 83. $(41.32 g)$
Solution:
$$ V=\frac{n R T}{p} $$
For acetylene gas, $5 g=\frac{5}{26} mol$
$$ \begin{aligned} & p=740 mm=\frac{740}{760} atm \ & T=50^{\circ} C=323 K \end{aligned} $$
Substituting in ideal gas equation
$$ V=\frac{5}{26} \times \frac{0.082 \times 323}{74} \times 76=5.23 L $$
