Air is a mixture of gases. True False Flag this Question Question 2 0.2 pts The percentage
Question:
Air is a mixture of gases.
True
False
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Question 2 0.2 pts
The percentage of oxygen in air is ___%.
0.9
78
0.1
21
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Question 3 0.2 pts
Different gases behave similarly in many cases because they havethe same ___ properties.
extensive
chemical
physical
intensive
nuclear
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Question 4 0.2 pts
All of the following are diatomic gases at room temperatureexcept ___.
nitrogen
hydrogen
oxygen
helium
chlorine
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Question 5 0.2 pts
Substances that are gases at room temperature are composed of___.
metals only
nonmetals only
metals and nonmetals
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Question 6 0.2 pts
Gases tend to have ___ molecular formulas and ___ molecularmasses.
complex, high
complex, low
simple, low
simple, high
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Question 7 0.2 pts
All of the following are characteristic of gases except ___.
random, quick motion that is independent of other gasparticles
indefinite volume
indefinite shape
extreme compressibility
very dense
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Question 8 0.2 pts
Two or more gases, when mixed, form a homogeneous mixtureregardless of the identities, properties, or proportions of thegases.
True
False
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Question 9 0.2 pts
Gases have the characteristic physical properties that they dobecause ___.
gas particles move very quickly
gas particles are very far apart, relatively speaking
gas particles act independently of each other
gas particles move randomly
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Question 10 0.2 pts
Pressure is ___.
force:-:area
force:+:area
frac{force}{area}
force:x:area
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Question 11 0.2 pts
All of the following are units of gas pressure except ___.
pound per square inch (psi)
liter (L)
millimeters of mercury (Hg)
atmosphere (atm)
inches of mercury (in Hg)
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Question 12 0.2 pts
All of the following are units of pressure except __.
torr
Pascal (Pa)
kilopascal (kPa)
Galileo (gal)
bar
Expert Answer:
