The density of a gas is found to be 1.56 ~g / L at 745 mm pressure and 65^ C . What is the moleculer mass of the gas?

Correct answer: A. 44.2 u Given, p=745 ~mm=(745)/(760) atm aligned & T=65^ C=65+273=338 ~K & aligned M & =(d R T)/(p)=(1.56 × 0.0821 × 338)/(745 / 760) & =44.2 u aligned aligned

JIPMER 2010

Exam: JIPMER
Year: 2010
Subject: Chemistry
Chapter: States of Matter

JIPMER 2010 · Chemistry · States of Matter

The density of a gas is found to be 1.56 ~g / L at 745 mm pressure...

The density of a gas is found to be

1.56 \mathrm{~g} / \mathrm{L}

at 745 mm pressure and

65^{\circ} \mathrm{C}

. What is the moleculer mass of the gas?

Options

A44.2 u
B4.42 u
C2.24 u
D22.4 u

Correct answer

A. 44.2 u

Step-by-step solution

Given,

p=745 \mathrm{~mm}=\frac{745}{760}

atm

\begin{aligned} & T=65^{\circ} \mathrm{C}=65+273=338 \mathrm{~K} \\ & \begin{aligned} \therefore \quad M & =\frac{d R T}{p}=\frac{1.56 \times 0.0821 \times 338}{745 / 760} \\ & =44.2 \mathrm{u} \end{aligned}

\end{aligned}$

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