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Chapter 7- Basics of Chemistry Flashcards | StudBud
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Chapter 7- Basics of Chemistry
Chapter 7- Basics of Chemistry
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1
What element is absent from the compunds studied in inorganic chemistry?
helium
carbon
nitrogen
oxygen
2
What are substances with a pH about 7.0?
alkaline
neutral
toxic
acids
3
What is the study of substances that contain carbon?
organic chemistry
carbon dating
carbon chemistry
organic dating
4
what does the term miscible mean?
incapable of being ionized
capable of being mixed
capable of being ionized
incapable of being mixed
5
How much of the air is made up of nitrogen?
4/5
1/4
2/3
3/8
6
What causes oxidation?
loss of both oxygen and hydrogen
addition of hydrogen or the loss of oxygen
addition of exygen or the loss of hydrogen
addition of both oxygen and hydrogen
7
What is light a form of?
matter
liquid
energy
gas
8
What do antioxidants prevent by neutralizing free radicals?
oxygenation
oxidation
ionization
radicalization
9
What business primarily use oil in water solutions?
fast food restaurants
auto repair shops
bakeries
salons and spas
10
What is true of liquid?
matter with fixed volume and definate shape
matter with no fixed volume and no definate shape
matter with fixed volume but no definate shape
matter with no fixed volume but definate shape
11
what is the natural pH of the skin?
5.5
7.0
3.5
7.5
12
What is an ion with a negative charge?
anion
neutron
cation
molecule
13
What is any substance that is dissolved by a solvent to form a solution?
solute
matter
emulsion
suspension
14
What are the 2 branches of chemistry?
alkaline and acidic
organic and inorganic
anagen and catagen
artificial and natural
15
What is an atom with a positive electrical charge?
molecule
anion
cation
neutron
16
What is air?
gaseous mixture that makes up the earths atmosphere
shell of radiation surrounding earth
common name for the chemical that makes the sky appear
water vapor that forms clouds
17
What is a solution?
unstable mixture of an emulsion and a reduction
unstable mixture of two or more immiscible substances
stable mixture of an emulsion and a reduction
uniform mixture of two or more mutually immiscible subtances
18
What element is found in all living things, whether they are plants or animals?
carbon
helium
zinc
radon
19
How much of the Earth's surface, approximately, is water?
75%
25%
10%
100%
20
What is true of water?
it is a relatively scarce substance
water comprises a very small portion of the human body
it is the most abundant of all substances on Earth
the human body is made entirely of water
21
What is the difference between water in oil (W/O) emulsions and oil in water (O/W) emulsions?
O/W emulsions are greasier
O/W emulsions are not easily rinsed away with water
W/O emulsions are easily rinsed away with water
W/O emulsions are greasier
22
What is true of elements?
elements are the simplest form of matter
in chemistry, the main elements are sunhshine, clouds, rain, and snow
there are only 5 basic elements in the universe
elements are the most complex form of matter
23
What are most skin care products?
suspensions of oi and water
solutions of oil and water
reductions of oil and water emulsion
emulsions of oil and water
24
What is true of moisturizer?
it is an water in oil emulsion
it is and oil in water reduction
it is an oil in water emulsion
it is a water in oil reduction
25
What term means "water loving"?
hydroactive
hydrophilic
hydrophobic
hydrocentric
26
What type of substance has a pH of 7?
neutral
toxic
acidic
alkaline
27
What term refers to substances with pH below 7.0?
bases
solutes
acids
alkalis
28
What is the composition, structure, and properties of matter & how matter changes under different conditions?
biology
ergonomics
physiology
chemistry
29
what is true of each of the approximately 990 naturally occuring elements?
all share the same physical anf chemical properties
each has its own distinctive physical anf chemical properties
though chemical properties vary, all have the same physical properties
though physical properties vary, all have the same chemical properties
30
What has physical properties that we can see, smell and taste, and touch?
energy
electricity
matter
radiation
31
What term means "oil loving"?
lipophobic
lipophilic
lipoactive
lipocentric
32
What is the term that refers to matter in its three physical forms (liquids, solids, gas)?
physical properties
states of matter
chemical properties
appearances of matter
33
What is NOT true of atoms?
all matter is composed of atoms
they are small particles of elements
all atoms are identical
atoms consisit of smaller particles
34
What type of neutralization reaction forms water and salt?
atom alkali
acid- alkali
reduction- compound
solution- compound
35
What term refers to molecules that contain two or more atoms of the same elment?
chemical molecules
elemental molecules
atomic molecules
radiological molecules
36
What is true of oxygen?
it is the least abundant element on earth
it should not be ingested because it is poisonous to humans
it is the most abundant element on Earth
contrary to popular belief, there is no oxygen in the air
37
What is an ion?
atom or molecule without an electrical charge
spark discharged during the ionization process
dust particle left over after the ionization process
atom or molecule that carries an electrical charge
38
What is united with the aid of an emulsifier to create an emulsion?
a reduction and a solution
two or more immisible substances
a surfactant and a liquid
two or more miscible substances
39
What is reduction?
addition of oxygen or the loss of hydrogen
addition of both oxygen and hydrogen
loss of both oxygen and hydrogen
loss of oxygen or the addition of hydrogen
