   Chapter 10, Problem 30PS

Chapter
Section
Textbook Problem

Acetaldehyde is a common liquid compound that vaporizes readily. Determine the molar mass of acetaldehyde from the following data:Sample mass = 0.107 g Volume of gas = 125 mLTemperature = 0.0 °C Pressure = 331 mm Hg

Interpretation Introduction

Interpretation:

The molar mass of acetaldehyde has to be determined.

Concept Introduction:

density=massvolume

density=PMRT

P-PressureM-MolarmassR-UniversalgasconstantT-Temperature

Explanation

Given that:

massofthecompound=0.107gvolume=125ml=0.125LPressure=331mmHg=0.4355atmTemperature=0°C=273K

density=massvolume=0.107g0.125L=0

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