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Cosi Chemistry Review Flashcards | StudBud
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Cosi Chemistry Review
Cosi Chemistry Review
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102.11-102.12
Flashcards
32 cards
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Practice quiz
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Questions
32
Answers
1
Water molecules have two hydrogen atoms and one:
Nitrogen atom
Helium atom
Oxygen atom
Sulfur atom
2
Carbon, nitrogen, oxygen, and hydrogen form the basis of:
Compounds
Elements
Mixtures
Amino acids
3
Which of following statements describes how humans hair is formed?
Amino acids cause a simple physical change
Hydrogen bonds create a chemical change
Salt bonds connect to amino acids
Bonding of protein chains to other protein chains
4
On the pH scale, numbers greater that 7 indicate a:
Neutral solutions
Alkaline solution
Acidic solution
Chemical solutions
5
Atoms have three main parts: protons, neutrons, and:
Neutrons
Electrons
Elements
Compounds
6
which bond found in the hair can be broken by heat or water?
Van der walls forces
Hydrogen bond
Peptide bond
Disulfide bond
7
The bonds found within hair that help organize proteins chains in order to build hair are called:
ionic bonds
Van der waals forces
water bonds
Side bonds
8
Atoms that are different form a:
Emulsion
Mixture
Compound
Elements
9
The term used to identify anything that occupies space is called:
A solid
Matter
Organic
A gas
10
What is the side bond that is of the greatest concern to the professional?
van der waals forces
Salt bond
Disulfide bond
Hydrogen bond
11
Hair consists of 97%:
Keratin
Electrons
Trace minerals
proton
12
On the pH scale, numbers less than 7 indicate:
Alkaline solutions
Acidic solution
Neutral solutions
Chemical solutions
13
What is created when amino acids join together in chains?
Proteins
Chemicals
Elements
Conpounds
14
Hair comprises two silica which are carbon and sulfur and three gases which are hydrogen nitrogen and:
Helium
Neon
Oxygen
Propane
15
Matter with definite weight, volume and shape is known as:
A solid
Matter
Organic
A gas
16
Matter with definite weight but indefinite volume and shape is called:
Organic
A solid
A liquid
A gas
17
Amino acids that create proteins are linked together end to end by:
Side bonds
Salts bonds
Alkaline bonds
Peptide bonds
18
What is the pH range is hair, skin, and nails?
7.5-10.5
6.5-7.0
11.5-12.0
4.5-5.5
19
Distilled water with a pH of 7 is considered:
An alkali
A salt
Neutral
An acid
20
The atomic number of a particular element indicates:
Number of protons in a single atom
Number of electons in a single atom
Number of atoms in a single element
Number of neutrons in a single atom
21
Electrons have which type of electrical charge?
Negative
Positive
None
Neutral
22
Which for the following is NOT an example of a physical change?
Shattering a piece of glass
Performing a haircut
Performing a thermal style
Iron changing to rust
23
Which of the following conditions is an example of a chemical change?
Raindrops turn to snow
Oxygen and hydrogen combining to form water
Water to ice
Water to steam
24
A pH of 5 is how many more times acidic that a pH of 6?
10 times
1000 times
100 times
1.5 times
25
Atoms that are the same form a:
Elements
Mixture
Emulsion
Compound
26
Matter with definite weight and volume but no definite shape is called:
A liquid
A solid
Organic
A gas
27
In what pH range is skin and hair?
7.5 to 10.5
11.5 to 12.0
6.5 to 7.0
4.5 to 5.5
28
Basic substances that cannot be broken down into simpler substances are called:
Solids
Compound
Molecules
Elements
29
Protons have which type of electrical charge?
Positive
Negative
None
Neutral
30
Water freezing and becoming ice is an example of what type of change?
Elemental
Chemical
Physical
Molecular
31
All matter thats never been alive, and doesnt contain carbon, such as rocks and minerals falls within the study of:
Inorganic chemistry
Physics
Organic chemistry
Anatomy
32
Neutrons have which type of electrical charge?
None
Positive
Chemical
Negative