Chapter 8 Chemistry. Test Questions Flashcards
0
Q
- Atoms are _______ ________ _________ _Of________ ________
A
Basic building blocks of all matter
1
Q
- ________ chemistry is the study of substances containing carbon.
A
Organic
2
Q
- _______ properties include melting and boiling points.
A
Physical
3
Q
- Chemical changes in the hair can be created by _______ because the chemical relation of oxidation take place.
A
Permanent hair color
4
Q
- ______ _________ is an example of a compound.
A
Sodium chloride
5
Q
- A _________ is any element combined with oxygen
A
Oxide
6
Q
- A physical mixture is a combination of ________ or ________ substances united physically and in any proportions.
A
Two or more
7
Q
- An example of a ___________ mixture is concrete.
A
Physical
8
Q
- The percentage of the human body that is composed of ______ is 65 percent .
A
Water
9
Q
- Soft water comes from ________ or is chemically softened
A
Rainwater
10
Q
- Hard water can be softened by _______ or by the use of sodium carbonate.
A
Distillation
11
Q
- The ______ use of a substance measures it’s acidity and akalinity
A
pH
12
Q
- An atom or molecule that ______ an _______ charge is called an ion
A
Carries an electrical
13
Q
- Only ________ solution have a pH
A
Aqueous
14
Q
- The pH of hair and skin is on average ______
A
5.0
15
Q
- Solution with a pH below ________ contract and harden the hair.
A
Below 7.0
16
Q
- ________ have a pH above 7.0 and soften and swell the hair.
A
Alkalis
17
Q
- When mixing acids alkalis _________ _________ neutralize each other.
A
Equal proportions
18
Q
- In the chemical reaction called ________ an element or compound combines with oxygen.
A
Oxidation
19
Q
- A substance from which_________ has been removed is a reduced substance.
A
Oxygen
20
Q
21.
A
21.
21
Q
22.
A
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22
Q
23
A
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23
Q
24
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