   Chapter 10, Problem 27PS

Chapter
Section
Textbook Problem

A 1 007-g sample of an unknown gas exerts a pressure of 715 mm Hg in a 452-mL container at 23 °C. What is the molai mass of the gas?

Interpretation Introduction

Interpretation:

The molar mass of the gas in a container has to be determined.

Concept Introduction:

density=massvolume

density=PMRT

P-PressureM-MolarmassR-UniversalgasconstantT-Temperature

Explanation

Given that:

massofthecompound=1.007gvolume=452ml=0.452LPressure=715mmHg=0.9407atmTemperature=23°C=296K

The molar mass of the given gas in the container can be calculated as

density=massvolume=1.007g0.452L=2

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