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Petroleum - What is it? Flashcards | StudBud
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Petroleum - What is it?
Petroleum - What is it?
29 terms
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chemistry in the community, science, chemistry, alkanes
Flashcards
29 cards
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Questions
29
Answers
1
The process used to separate two or more liquids based on differing boiling points is
distillation
filtration
precipitation
crystallization
2
Petroleum is separated into its components for use as fuel and other products using
a centrifuge
chromatography
fractional distillation
precipitation
3
Intermolecular forces are strongest in petroleum's
light distillates
residues (bottoms)
gaseous fraction
heavy distillates
4
How many carbon atoms per molecule are found in gasoline fraction of petroleum?
1-4
5-12
13-18
18+
5
What is the formula for an alkane with 12 carbons?
C12H12
CH12
C12H24
C12H26
6
In a fractionating tower, the thick liquids that do not vaporize are called
residues (bottoms)
heavy distillates
waste gases
gasoline
7
Where in the fractionating tower is the temperature the lowest?
Bottom
Same throughout
Top
Middle
8
Structural isomers have the same
chemical properties
molecular geometry
physical properties
molecular formula
9
Which compound has the lowest boiling point?
CH4
C3H8
C7H14
C5H12
10
Which sample of petroleum has
high viscosity
?
Mineral oil, (12-20 carbon atoms per molecule)
heptane (7 carbons per molecule)
propanol (3 carbons per molecule)
water (0 carbons)
11
Hydrocarbons are compounds that contain
carbon & hydrogen atoms
oxygen & hydrogen atoms
carbon & nitrogen atoms
oxygen & carbon atoms
12
Which alkane has a molar mass of 16 g/mol?
C3H8
C2H6
CH4
C4H10
13
What does the isomer name 3-methylhexane tell you?
there is a 3 Carbon branch off of one of the carbons
the parent chain has 3 carbons
there is a branch off of the 3rd carbon in the chain
there are 3 branches off of the 6th carbon in the chain
14
Alkanes are hydrocarbons with one or more ___ carbon-carbon bond.
double
triple
quadruple
single
15
Isomers are different compounds that have
same structural formula, different physical properties
same molecular formula, different structural formula
same empirical formula, different molecular formula
same arrangement, different element
16
The energy stored in petroleum is from
sunlight
microorganisms
atmosphere
meteors
17
Petroleum reserves are uniformly distributed throughout the world (true or false)
false
true
18
An unbranched alkane containing seven carbons is called
butane
heptane
hexane
propane
19
This region has the largest petroleum reserves compared to its population
Middle East
South America
North America
Asia
20
This is an isomer of...
pentane
butane
propane
ethane
21
How many alkyl groups does 3-ethyl-2,4-dimethyloctane have?
3
2
9
6
22
As the number of C atoms in a molecule increase, the boiling points...
decreases
increases
remains the same
vary with each hydrocarbon
23
What does the root "but-" stand for?
6
8
2
4
24
Water and 2-propanol can be separated by distillation due to their differences in
specific gravity
boiling points
molecular formulas
colors
25
How many isomers does pentane have?
6
5
3
4
26
Carbon footprint is measured in units of
inches of CO2
feet of CO2
liters of CO2
kilograms or tons of CO2
27
At what level in fractionating tower is the fraction with the highest boiling point?
top
middle
bottom
28
This region has the largest consumption of petroleum compared to its population
Eurasia (Russia)
North America
Europe
Asia
29
This is the structural formula for
butane
pentane
propane
ethane
