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PORTAGE LEARNING CHEM 103 GENERAL CHEMISTRY I
MODULE 3 /CHEM 103 FINAL EXAM 2025/2026 WITH
COMPLETE QUESTIONS AND VERIFIED ANSWERS
|ALREADY GRADED A+|
What is a hydrocarbon? - ANSWER-has carbons and hydrogens
What is an alkane and what is the general formula for an alkane?
- ANSWER-An alkane is a hydrocarbon with single bonds only;
CnH2n+2
How do you name alkanes? - ANSWER--ane
Give the molecular formulas for these alkanes:
methane, ethane, propane, butane and pentane - ANSWER-
CH4,C2H6,C3H8,C4H10,C5H12
Give the names for these molecular formulas: C6H14,
C7H16,C8H18, C9H20, C10H22 - ANSWER-hexane,
heptane,octane,nonane, decane.
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Which alkane is 85% of natural gas? - ANSWER-methane
Which alkanes contribute to the formation of fuel? - ANSWER-
propane and butane
Are alkanes saturated? - ANSWER-Yes
What are structural/constitutional isomers? - ANSWER-
compounds that have the same molecular formula but different
structural formulas.
When do alkanes start having structural isomers? - ANSWER-at
butane(2)
What does an isopropyl group look like? - ANSWER-CH3CH
CH3
What does isobutyl look like? - ANSWER-CH3CHCH2
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CH3
What is the formula for cycloalkanes? - ANSWER-CnH2n
Which cycloalkanes are the most abundant and stable? -
ANSWER-cyclopentane and cyclohexane, tetrahedral form(109.5)
in cyclohexanes.
What are the two forms of the tetrahedral cyclohexane? -
ANSWER-boat and chair
What are some physical properties of alkanes? - ANSWER-
nonpolar, insoluble in water. Gas from 1-4 carbons, liquid from 5-
17, and solid 18 and above.
Density = - ANSWER-< 1 g/ml
Chemical Properties - ANSWER-1. Combustion with oxygen to
produce carbon dioxide and water.
2. Substition. E.g.; CH3Cl+ HCl, CH2Cl2+2HCl
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Properties of halogenated hydrocarbons - ANSWER-good
solvents-not very reactive or flammable. Many are toxic or
pollutants.
Common name for chloromethane(CH3Cl) - ANSWER-methyl
chloride
Common name for dichloromethane(CH2Cl2) - ANSWER-
methylene chloride
Common name for trichloromethane(CHCl3) - ANSWER-
chloroform
Common name for tetrachloromethane(CCl4) - ANSWER-carbon
tetrachloride
What is the formula and functions of halothane? - ANSWER-2-
bromo-2-chloro-1,1,1-triflouroethane
general anesthetic
PORTAGE LEARNING CHEM 103 GENERAL CHEMISTRY I
MODULE 3 /CHEM 103 FINAL EXAM 2025/2026 WITH
COMPLETE QUESTIONS AND VERIFIED ANSWERS
|ALREADY GRADED A+|
What is a hydrocarbon? - ANSWER-has carbons and hydrogens
What is an alkane and what is the general formula for an alkane?
- ANSWER-An alkane is a hydrocarbon with single bonds only;
CnH2n+2
How do you name alkanes? - ANSWER--ane
Give the molecular formulas for these alkanes:
methane, ethane, propane, butane and pentane - ANSWER-
CH4,C2H6,C3H8,C4H10,C5H12
Give the names for these molecular formulas: C6H14,
C7H16,C8H18, C9H20, C10H22 - ANSWER-hexane,
heptane,octane,nonane, decane.
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Which alkane is 85% of natural gas? - ANSWER-methane
Which alkanes contribute to the formation of fuel? - ANSWER-
propane and butane
Are alkanes saturated? - ANSWER-Yes
What are structural/constitutional isomers? - ANSWER-
compounds that have the same molecular formula but different
structural formulas.
When do alkanes start having structural isomers? - ANSWER-at
butane(2)
What does an isopropyl group look like? - ANSWER-CH3CH
CH3
What does isobutyl look like? - ANSWER-CH3CHCH2
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CH3
What is the formula for cycloalkanes? - ANSWER-CnH2n
Which cycloalkanes are the most abundant and stable? -
ANSWER-cyclopentane and cyclohexane, tetrahedral form(109.5)
in cyclohexanes.
What are the two forms of the tetrahedral cyclohexane? -
ANSWER-boat and chair
What are some physical properties of alkanes? - ANSWER-
nonpolar, insoluble in water. Gas from 1-4 carbons, liquid from 5-
17, and solid 18 and above.
Density = - ANSWER-< 1 g/ml
Chemical Properties - ANSWER-1. Combustion with oxygen to
produce carbon dioxide and water.
2. Substition. E.g.; CH3Cl+ HCl, CH2Cl2+2HCl
, Page |4
Properties of halogenated hydrocarbons - ANSWER-good
solvents-not very reactive or flammable. Many are toxic or
pollutants.
Common name for chloromethane(CH3Cl) - ANSWER-methyl
chloride
Common name for dichloromethane(CH2Cl2) - ANSWER-
methylene chloride
Common name for trichloromethane(CHCl3) - ANSWER-
chloroform
Common name for tetrachloromethane(CCl4) - ANSWER-carbon
tetrachloride
What is the formula and functions of halothane? - ANSWER-2-
bromo-2-chloro-1,1,1-triflouroethane
general anesthetic
