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Hydrocarbons
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What should you be able to describe by the end of the video?
How
crude oil
is
formed
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What is meant by a hydrocarbon?
Molecules made of
hydrogen
and carbon
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What is an alkane?
A type of
hydrocarbon
with specific properties
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What products are derived from crude oil?
Plastics
Petrol
Pharmaceuticals
Cosmetics
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How is crude oil formed?
From remains of tiny
sea creatures
buried in mud
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What type of resource is crude oil?
Finite resource
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What is the formula for methane?
CH<sub>4</sub>
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What does the structural formula of methane show?
One
carbon
atom bonded to four
hydrogen
atoms
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What is the definition of a hydrocarbon?
Molecules made up of
hydrogen
and carbon atoms only
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What are hydrocarbons like methane and ethane called?
Alkanes
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What is the general formula for alkanes?
C<sub>n</sub>H<sub>2n+2</sub>
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If n equals 1, how many hydrogen atoms are in methane?
4
hydrogen atoms
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If n equals 2, how many hydrogen atoms are in ethane?
6
hydrogen atoms
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How many hydrogen atoms are in butane with four carbon atoms?
10
hydrogen atoms
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Why are alkanes considered saturated molecules?
Carbon atoms
are fully bonded to
hydrogen atoms
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How many hydrogen atoms are in propane with three carbon atoms?
8 hydrogen
atoms
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Which alkane structures should you memorize for the exam?
Methane
Ethane
Propane
Butane
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Where can you find more questions on hydrocarbons?
In the
revision workbook
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How long does it take for crude oil to form?
Millions
of years
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What are the remains of tiny sea creatures called?
Plankton
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What is the significance of covalent bonds in hydrocarbons?
They hold
atoms
together in molecules
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What distinguishes saturated hydrocarbons from unsaturated ones?
Saturated have only
single bonds
between carbons
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