General Chemistry
General Chemistry
7th Edition
ISBN: 9780073402758
Author: Chang, Raymond/ Goldsby
Publisher: McGraw-Hill College
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Chapter 3, Problem 3.40QP
Interpretation Introduction

Interpretation: The percent composition by mass of chloroform (CHCl3) has to be calculated.

Concept introduction: Percent composition by mass of each element present in a compound is known as the compound’s percent composition by mass.

Percentbymassofanelement=n×atomicmassofelementmolecularorformulamassofcompound×100%Wherenisthenumberofatomsoftheelementinamoleculeorformulaunitofthecompound

To determine: The percent composition by mass of chloroform (CHCl3)

Expert Solution & Answer
Check Mark

Answer to Problem 3.40QP

The percent composition by mass of chloroform is %C=10.06%;%H=0.85%;%Cl=89.0946% because of rounding the overall percentage is slightly more 100.0046%.

Explanation of Solution

Percent composition by mass: percent composition by mass of each element present in a compound is known as the compound’s percent composition by mass. The formula is expressed mathematically as follows:

Percentbymassofanelement=n×atomicmassofelementmolecularorformulamassofcompound×100%Wherenisthenumberofatomsoftheelementinamoleculeorformulaunitofthecompound By using the above formula percent composition by mass of chloroform is calculated as follows:

MolecularmassofCHCl3=massofCinamu+massofHinamu+(3×massofClinamu)=12.0107amu+1.0079amu+(3×35.453)amu=(12.0107+1.0079+106.359)amu=119.3776amu

Percentbymassof%C=1×atomicmassCinamumolecularmassofCHCl3inamu×100%=12.0107amu119.3776amu×100%=10.06%

Percentbymassof%H=1×atomicmassHinamumolecularmassofCHCl3inamu×100%=1.00794amu119.3776amu×100%=0.844% Percentbymassof%Cl3=3×atomicmassClinamumolecularmassofCHCl3inamu×100%=3×35.453amu119.3776amu×100%=106.359amu119.3776amu×100%=89.0946%

The percent composition by mass of chloroform is %C=10.06%;%H=0.85%;%Cl=89.0946% because of rounding the overall percentage is slightly more 100.0046%.General Chemistry, Chapter 3, Problem 3.40QP

Conclusion

The percent composition by mass of chloroform (CHCl3) was calculated.

percentmassof%C=10.06%

percentmassof%H=0.85%

                      percentmassof%Cl=89.0946%

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Chapter 3 Solutions

General Chemistry

Ch. 3.4 - Review of Concepts Explain how the mass...Ch. 3.5 - Practice Exercise Calculate the percent...Ch. 3.5 - Prob. 2PECh. 3.5 - Practice Exercise Calculate the number of grams of...Ch. 3.5 - Prob. 1RCCh. 3.6 - Practice Exercise A sample of a compound...Ch. 3.6 - Prob. 1RCCh. 3.7 - Prob. 1PECh. 3.7 - Prob. 1RCCh. 3.8 - Prob. 1PECh. 3.8 - Prob. 2PECh. 3.8 - Prob. 1RCCh. 3.9 - Prob. 1PECh. 3.9 - Consider the following reaction: Starting with...Ch. 3.10 - Prob. 1PECh. 3.10 - Can the percent yield ever exceed the theoretical...Ch. 3 - Prob. 3.1QPCh. 3 - Prob. 3.2QPCh. 3 - Prob. 3.3QPCh. 3 - Prob. 3.4QPCh. 3 - Prob. 3.5QPCh. 3 - 3.6 The atomic masses of and are 6.0151 amu and...Ch. 3 - Prob. 3.7QPCh. 3 - Prob. 3.8QPCh. 3 - Prob. 3.9QPCh. 3 - 3.10 What is the molar mass of an atom? What are...Ch. 3 - Prob. 3.11QPCh. 3 - Prob. 3.12QPCh. 3 - Prob. 3.13QPCh. 3 - Prob. 3.14QPCh. 3 - Prob. 3.15QPCh. 3 - Prob. 3.16QPCh. 3 - 3.17 What is the mass in grams of a single atom of...Ch. 3 - Prob. 3.18QPCh. 3 - Prob. 3.19QPCh. 3 - Prob. 3.20QPCh. 3 - Prob. 3.21QPCh. 3 - Prob. 3.22QPCh. 3 - Prob. 3.23QPCh. 3 - Prob. 3.24QPCh. 3 - Prob. 3.25QPCh. 3 - Prob. 3.26QPCh. 3 - Prob. 3.27QPCh. 3 - Prob. 3.28QPCh. 3 - Prob. 3.29QPCh. 3 - Prob. 3.30QPCh. 3 - Prob. 3.31QPCh. 3 - Prob. 3.32QPCh. 3 - Prob. 3.33QPCh. 3 - Prob. 3.34QPCh. 3 - Prob. 3.35QPCh. 3 - Prob. 3.36QPCh. 3 - Prob. 3.37QPCh. 3 - Prob. 3.38QPCh. 3 - Prob. 3.39QPCh. 3 - Prob. 3.40QPCh. 3 - Prob. 3.41QPCh. 3 - Prob. 3.42QPCh. 3 - Prob. 3.43QPCh. 3 - 3.44 Peroxyacylnitrate (PAN) is one of the...Ch. 3 - Prob. 3.45QPCh. 3 - Prob. 3.46QPCh. 3 - Prob. 3.47QPCh. 3 - Prob. 3.48QPCh. 3 - Prob. 3.49QPCh. 3 - Prob. 3.50QPCh. 3 - Prob. 3.51QPCh. 3 - 3.52 The empirical formula of a compound is CH. If...Ch. 3 - Prob. 3.53QPCh. 3 - Prob. 3.54QPCh. 3 - Prob. 3.55QPCh. 3 - Prob. 3.56QPCh. 3 - Prob. 3.57QPCh. 3 - Prob. 3.58QPCh. 3 - Prob. 3.59QPCh. 3 - Prob. 3.60QPCh. 3 - Prob. 3.61QPCh. 3 - Prob. 3.62QPCh. 3 - Prob. 3.63QPCh. 3 - 3.64 Which of the following equations best...Ch. 3 - Prob. 3.65QPCh. 3 - Prob. 3.66QPCh. 3 - Prob. 3.67QPCh. 3 - Prob. 3.68QPCh. 3 - Prob. 3.69QPCh. 3 - Prob. 3.70QPCh. 3 - Prob. 3.71QPCh. 3 - Prob. 3.72QPCh. 3 - Prob. 3.73QPCh. 3 - Prob. 3.74QPCh. 3 - 3.75 Limestone (CaCO3) is decomposed by heating to...Ch. 3 - Prob. 3.76QPCh. 3 - Prob. 3.77QPCh. 3 - Prob. 3.78QPCh. 3 - 3.79 Define limiting reagent and excess reagent....Ch. 3 - Prob. 3.80QPCh. 3 - Prob. 3.81QPCh. 3 - Prob. 3.82QPCh. 3 - Prob. 3.83QPCh. 3 - Prob. 3.84QPCh. 3 - Prob. 3.85QPCh. 3 - Prob. 3.86QPCh. 3 - Prob. 3.87QPCh. 3 - Prob. 3.88QPCh. 3 - Prob. 3.89QPCh. 3 - Prob. 3.90QPCh. 3 - Prob. 3.91QPCh. 3 - Prob. 3.92QPCh. 3 - Prob. 3.93QPCh. 3 - Prob. 3.94QPCh. 3 - Prob. 3.95QPCh. 3 - Prob. 3.96QPCh. 3 - Prob. 3.97QPCh. 3 - Prob. 3.98QPCh. 3 - Prob. 3.99QPCh. 3 - Prob. 3.100QPCh. 3 - Prob. 3.101QPCh. 3 - Prob. 3.102QPCh. 3 - Prob. 3.103QPCh. 3 - Prob. 3.104QPCh. 3 - Prob. 3.105QPCh. 3 - Prob. 3.106QPCh. 3 - Prob. 3.107QPCh. 3 - Prob. 3.108QPCh. 3 - Prob. 3.110QPCh. 3 - Prob. 3.111QPCh. 3 - Prob. 3.112QPCh. 3 - Prob. 3.113QPCh. 3 - 3.114 In the total synthesis of a natural product,...Ch. 3 - Prob. 3.115QPCh. 3 - Prob. 3.116SPCh. 3 - Prob. 3.117SPCh. 3 - 3.118 A certain metal M forms a bromide containing...Ch. 3 - Prob. 3.119SPCh. 3 - Prob. 3.120SP
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