CHEM 219: MODULE 2 EXAM QUESTIONS WITH
ANSWERS ALL ANSWERS 100% GET IT CORRECT
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What are hydrocarbons? - CORRECT ANSWERS Molecules composed of only
the elements carbon and hydrogen
What are the two major classes of hydrocarbons? - CORRECT ANSWERS
Aromatic (benzene) and aliphatic (alkanes, alkenes, alkynes)
What is the main source of hydrocarbons? - CORRECT ANSWERS Fossil fuels
like coal, petroleum, and natural gas obtained by mining and drilling.
What are Alkanes? - CORRECT ANSWERS They are saturated hydrocarbons
because their skeleton is only composed of C-C single bonds.
How can alkanes exist? - CORRECT ANSWERS They can be linear, branched or
exist in ring formations called cycloalkanes.
Describe a higher/more complex alkane structure: - CORRECT ANSWERS They
will have more carbons and/or increased structural diversity.
What is the general formula of Alkanes? - CORRECT ANSWERS CnH2n+2
The names of the alkanes reflect? - CORRECT ANSWERS The number of
carbons present.
How many isomers does each alkane have from 1-10 - CORRECT ANSWERS
1,1,1,2,3,5,9,18,35,75
,CHEM 219: MODULE 2 EXAM QUESTIONS WITH
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Name the first ten prefix of alkanes: - CORRECT ANSWERS Methane, ethane,
propane, butane, pentane, hexane, heptane, octane, nonane, decane.
As the molecular weight increases: - CORRECT ANSWERS The number of
isomers increase.
What does the suffix -ane mean? - CORRECT ANSWERS Denotes a saturated
hydrocarbon. It is used for all acyclic saturated alkanes
What is nomenclature? - CORRECT ANSWERS The naming of a molecular
structure. Historically they were named after their source, now they are
systemic.
Why is nomenclature important? - CORRECT ANSWERS Because we cannot
remember all the prefixes since a MF composed of carbons can have several
different patterns of connectivity.
What is it meant by the systemic approach? - CORRECT ANSWERS There are
now methods of naming molecules so that they all have unique names. You can
then determine the structure from only the name and vice-versa.
IUPAC rules for naming branced alkanes: - CORRECT ANSWERS 1. Find the
parent name by identifying the longest continuous chain of carbons.
2. Number the parent chain. (begin at the end of the chain nearest to the first
branch.)
3. If there are two equally long continuous chains, select the one with most
branches.
, CHEM 219: MODULE 2 EXAM QUESTIONS WITH
ANSWERS ALL ANSWERS 100% GET IT CORRECT
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4. If the first branch point is the same distance, choose the one that gives the
lowest substituents.
5. If the substituents are both equidistant then choose the numbering so the
substituent goes with the higher alphabetic priority.
How are linear alkanes named? - CORRECT ANSWERS By combining the prefix
indicating the number to the suffix -ane.
What is a substituent? - CORRECT ANSWERS Any group attached to the parent
chain.
What are alkyl groups? - CORRECT ANSWERS Saturated hydrocarbon
substituents. You drop the -yl for -ane.
A one carbon substituent is a methyl group, four carbon is butyl.
What is a locant? - CORRECT ANSWERS A number used to determine the
suffix.
Describes the position of substituents.
What happens when two or more of the same type of substituents are present
on the parent chain? Like 3 methyl groups - CORRECT ANSWERS Additional
prefixes including the number are added.
How would you describe finding 2,3 dimethylpentane? - CORRECT ANSWERS It
is a 5 carbon chain, then it has substituents on numbers 2, 3 and those are
methyl groups.
ANSWERS ALL ANSWERS 100% GET IT CORRECT
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What are hydrocarbons? - CORRECT ANSWERS Molecules composed of only
the elements carbon and hydrogen
What are the two major classes of hydrocarbons? - CORRECT ANSWERS
Aromatic (benzene) and aliphatic (alkanes, alkenes, alkynes)
What is the main source of hydrocarbons? - CORRECT ANSWERS Fossil fuels
like coal, petroleum, and natural gas obtained by mining and drilling.
What are Alkanes? - CORRECT ANSWERS They are saturated hydrocarbons
because their skeleton is only composed of C-C single bonds.
How can alkanes exist? - CORRECT ANSWERS They can be linear, branched or
exist in ring formations called cycloalkanes.
Describe a higher/more complex alkane structure: - CORRECT ANSWERS They
will have more carbons and/or increased structural diversity.
What is the general formula of Alkanes? - CORRECT ANSWERS CnH2n+2
The names of the alkanes reflect? - CORRECT ANSWERS The number of
carbons present.
How many isomers does each alkane have from 1-10 - CORRECT ANSWERS
1,1,1,2,3,5,9,18,35,75
,CHEM 219: MODULE 2 EXAM QUESTIONS WITH
ANSWERS ALL ANSWERS 100% GET IT CORRECT
VERIFIED/DETAILED LATEST UPDATED 2024/2025 BEST
RATED A+ FOR SUCCESS IN CHEM
Name the first ten prefix of alkanes: - CORRECT ANSWERS Methane, ethane,
propane, butane, pentane, hexane, heptane, octane, nonane, decane.
As the molecular weight increases: - CORRECT ANSWERS The number of
isomers increase.
What does the suffix -ane mean? - CORRECT ANSWERS Denotes a saturated
hydrocarbon. It is used for all acyclic saturated alkanes
What is nomenclature? - CORRECT ANSWERS The naming of a molecular
structure. Historically they were named after their source, now they are
systemic.
Why is nomenclature important? - CORRECT ANSWERS Because we cannot
remember all the prefixes since a MF composed of carbons can have several
different patterns of connectivity.
What is it meant by the systemic approach? - CORRECT ANSWERS There are
now methods of naming molecules so that they all have unique names. You can
then determine the structure from only the name and vice-versa.
IUPAC rules for naming branced alkanes: - CORRECT ANSWERS 1. Find the
parent name by identifying the longest continuous chain of carbons.
2. Number the parent chain. (begin at the end of the chain nearest to the first
branch.)
3. If there are two equally long continuous chains, select the one with most
branches.
, CHEM 219: MODULE 2 EXAM QUESTIONS WITH
ANSWERS ALL ANSWERS 100% GET IT CORRECT
VERIFIED/DETAILED LATEST UPDATED 2024/2025 BEST
RATED A+ FOR SUCCESS IN CHEM
4. If the first branch point is the same distance, choose the one that gives the
lowest substituents.
5. If the substituents are both equidistant then choose the numbering so the
substituent goes with the higher alphabetic priority.
How are linear alkanes named? - CORRECT ANSWERS By combining the prefix
indicating the number to the suffix -ane.
What is a substituent? - CORRECT ANSWERS Any group attached to the parent
chain.
What are alkyl groups? - CORRECT ANSWERS Saturated hydrocarbon
substituents. You drop the -yl for -ane.
A one carbon substituent is a methyl group, four carbon is butyl.
What is a locant? - CORRECT ANSWERS A number used to determine the
suffix.
Describes the position of substituents.
What happens when two or more of the same type of substituents are present
on the parent chain? Like 3 methyl groups - CORRECT ANSWERS Additional
prefixes including the number are added.
How would you describe finding 2,3 dimethylpentane? - CORRECT ANSWERS It
is a 5 carbon chain, then it has substituents on numbers 2, 3 and those are
methyl groups.
