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The Answer Page

This page contains all the answers to the exercises in our tutorial. Simply scroll down and find the sections you are looking for. Not all chapters have an exercise section.

**Note: All questions and answers are selected from Zumdahl/Intro. Chemistry/2nd Edition/© 1993 Houghton Mifflin Company.

 

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Exercises

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Answers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.1 Units and Conversions

1.
a. 2.44 yd e. 648.1 mi.
b. 42.2 m f. 716.9 km
c. 115 in. g. 0.0362 km
d. 2238 cm h. 5.01 x 104 cm
  2.
a. 28 g/cubic cm
b. 0.034 g/cubic cm
c. 0.962 g/cubic cm
d. 2.1 x 10-5 g/cubic cm


2.2 Significant Figures

a. 641.0 a. 124
b. 1.327 b. 1.995 x 10-23
c. 77.34 c. 1.14 x 10-2
d. 3215 d. 5.3 x 10-4

Chapter 2 Exercises

4.1 Writing Formulas from Compound Names

a. CO2 e. Ca3(PO4)2
b. SO3 f. NH4NO3
c. N2Cl4 g. Al(HSO4)3
d. CI4 h. BaSO4

4.2 Balancing Chemical Equations

a. Br2 + 2KI 2KBr + I2(s) e. PBr3 +3H2O H3PO3 + 3HBr
b. 4Co + 3O2 2Co2O3(s) f. 2NO + O2 2NO2
c. P4 + 5O2 2P4O10(s) g. 2C2H6 + 7O2 4CO2 + 6H2O
d. 4Al + 6HNO3 2Al2(NO3)3 +3H2 h. CuO + H2SO4 CuSO4 + H2O

Chapter 4 Exercises

5.3 Electron Configuration
1.
a. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 c. 1s2
b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 d. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

2.
a. [Ne] 3s2 3p2 c. [Ar] 4s2 3d10
b. [Ar] 4s2 3d10 4p1 d. [Ar] 4s2 3d1
  3.
a. 5d c. 5d
b. 4f d. 3d


Chapter 5 Exercises

8.2 Deriving Chemical Reactions

1.
2Zn + O2 2ZnO(s); 4Al + 3O2 2Al2O3(s);
2Fe(s) + O2 2FeO(s), 4Fe + 3O2 2Fe2O3(s);
2Cr(s) + O2 2CrO(s), 4Cr +3O2 2Cr2O3(s); 2Ni + O2 2NiO(s)

2.
Fe + H2SO4 FeSO4 + H2;
Zn + H2SO4ZnSO4 + H2; Cu + H2SO4CuSO4 + H2;
Co + H2SO4 CoSO4 + H2; Ni + H2SO4 NiSO4 + H2

Chapter 8 Exercises

 

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