Test Bank for General Chemistry 10th
b b b b b
Edition by Darrell Ebbing, Steven D.
b b b b b
Gammon
SAMPLE
Chapter 3 – Calculations with Chemical Formulas and Equations
b b b b b b b b
Chapter 3 – Calculations with Chemical Formulas and Equations
b b b b b b b b
1.bThebmolecularbformulabofbabparticularbsolidbisbC8H6O8.bItsbmolecularbmassbisb
A)b352bamu.
B)118bamu.
C)b364bamu.b
D)b230bamu.b
E)b226bamu.
ANS:bDb
PTS:b1bDIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bmolecularbmassbMSC:bgeneral
chemistry
2.bThebhydrocarbonbheptanebhasbthebstructuralbformulabCH3(CH2)5CH3.bWhatbisbthebmolecular
massbofbthisbhydrocarbon?b
A)b100.2bamu.
B)b0.009980bamu.
C)b86.17bamu.
D)b0.01160bamu.
E)b110.2bbamu.
,ANS:bAbPTS:b1b
DIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstance
3.bAbsinglebmoleculebofbpolystyrenebhasbthebrepeatingbunitb-[CH2CH(C6H5)]n-,bwherebnbisbthe
numberbofbrepeatingbunits.bWhatbisbthebvaluebofbnbifbthebmolecularbmassbofbabsinglebpolymer
Chainbisbamu?b
A)bUnits.b
B)bUnits.b
C)bUnits.b
D)bUnits.b
E)bUnits.
ANS:bAbPTS:b1b
DIF:bmoderatebREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstanceb
Thebformulabmassbofbaluminumboxalate,bAl2(C2O4)3,bisb
A)b140bamu.
B)b318bamu.
C)b283amu.
D)b213bamu.
E)b185bamu.
ANS:bBbPTS:b
1bDIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bformulabmass
MSC:bgeneralbchemistry
5.bThebformulabmassbofbzincbacetatebtrihydrate,bZn(CH3COO)2b•b3H2O,bis
, A)b321bamu.
B)b184amu.
C)b268bamu.
D)b238bamu.
E)b114bamu.
ANS:bDbPTS:b1b
DIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bformulabmassbMSC:bgeneral
chemistry
6.bThebfullybhydratedbformbofbsodiumbsulfatebisbthebdecahydrate,bNa2SO4b•b10H2O.bWhen
heatedbthebhydratedbsaltblosesbwater.bHowbmanybwaterbmoleculesbarebfoundbperbformulabunitbinba
partiallybdehydratedbsamplebofbsodiumbsulfatebwithbabformulabmassbofb160.1bamub(i.e.bfindbn
forbNa2SO4b•bnH2O)?
A)b1bwaters.
B)b5bwaters.
C)b3bwaters.
D)b4bwaters.
E)b7bwaters.
ANS:bAbPTS:b1b
DIF:bmoderatebREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstance
7.bWhatbisbthebmolecularbmassbofbcycloheptane,bC7H14?
A)b13.02bamu
B)b1191.19bamu
C)b85.08amu
b b b b b
Edition by Darrell Ebbing, Steven D.
b b b b b
Gammon
SAMPLE
Chapter 3 – Calculations with Chemical Formulas and Equations
b b b b b b b b
Chapter 3 – Calculations with Chemical Formulas and Equations
b b b b b b b b
1.bThebmolecularbformulabofbabparticularbsolidbisbC8H6O8.bItsbmolecularbmassbisb
A)b352bamu.
B)118bamu.
C)b364bamu.b
D)b230bamu.b
E)b226bamu.
ANS:bDb
PTS:b1bDIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bmolecularbmassbMSC:bgeneral
chemistry
2.bThebhydrocarbonbheptanebhasbthebstructuralbformulabCH3(CH2)5CH3.bWhatbisbthebmolecular
massbofbthisbhydrocarbon?b
A)b100.2bamu.
B)b0.009980bamu.
C)b86.17bamu.
D)b0.01160bamu.
E)b110.2bbamu.
,ANS:bAbPTS:b1b
DIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstance
3.bAbsinglebmoleculebofbpolystyrenebhasbthebrepeatingbunitb-[CH2CH(C6H5)]n-,bwherebnbisbthe
numberbofbrepeatingbunits.bWhatbisbthebvaluebofbnbifbthebmolecularbmassbofbabsinglebpolymer
Chainbisbamu?b
A)bUnits.b
B)bUnits.b
C)bUnits.b
D)bUnits.b
E)bUnits.
ANS:bAbPTS:b1b
DIF:bmoderatebREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstanceb
Thebformulabmassbofbaluminumboxalate,bAl2(C2O4)3,bisb
A)b140bamu.
B)b318bamu.
C)b283amu.
D)b213bamu.
E)b185bamu.
ANS:bBbPTS:b
1bDIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bformulabmass
MSC:bgeneralbchemistry
5.bThebformulabmassbofbzincbacetatebtrihydrate,bZn(CH3COO)2b•b3H2O,bis
, A)b321bamu.
B)b184amu.
C)b268bamu.
D)b238bamu.
E)b114bamu.
ANS:bDbPTS:b1b
DIF:beasybREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.b(Example
3.1)bTOP:bstoichiometryb|bmassbandbmolesbofbsubstancebKEY:bformulabmassbMSC:bgeneral
chemistry
6.bThebfullybhydratedbformbofbsodiumbsulfatebisbthebdecahydrate,bNa2SO4b•b10H2O.bWhen
heatedbthebhydratedbsaltblosesbwater.bHowbmanybwaterbmoleculesbarebfoundbperbformulabunitbinba
partiallybdehydratedbsamplebofbsodiumbsulfatebwithbabformulabmassbofb160.1bamub(i.e.bfindbn
forbNa2SO4b•bnH2O)?
A)b1bwaters.
B)b5bwaters.
C)b3bwaters.
D)b4bwaters.
E)b7bwaters.
ANS:bAbPTS:b1b
DIF:bmoderatebREF:b3.1OBJ:bCalculatebthebformulabmassbfrombabformula.bTOP:
Stoichiometryb|bmassbandbmolesbofbsubstance
7.bWhatbisbthebmolecularbmassbofbcycloheptane,bC7H14?
A)b13.02bamu
B)b1191.19bamu
C)b85.08amu
