Question #18 Consider the compound C6H7O2(OH)3. How many atoms of oxygen are pre
ID: 1313333 • Letter: Q
Question
Question #18
Consider the compound C6H7O2(OH)3.
How many atoms of oxygen are present?
1. 2
2. None of these
3. 1
4. 5
5. 4
6. 3
7. 6
Question #19
In the chemical reaction
Fe + CuSO4 ! FeSO4 + Cu,
CuSO4 is a
1. reactant.
2. subscript.
3. product.
4. coefficient.
Question #21
Which of the following involves a chemical
change?
1. chopping wood
2. boiling water
3. melting ice
4. breaking a glass
5. cooking an egg
Question #22
Elements chemically combine to form ? .
1. other elements
2. isotopes
3. mixtures
4. atoms
5. compounds
Question #23
Which of the following is the most likely to be
a compound instead of a mixture or element?
1. gasoline
2. popcorn
3. shampoo
4. saccharin sweetner
Question #24
The Periodic Table in our textbook indicates
that the atomic weight of the element magne-
sium is 24.305.
Which units should be associated with this
number?
1. g
2. Avagadros number
3. g/mol
4. mole
5. arbitrary units
Question #25
Substances produced when atoms of elements
chemically combine with each other are called
1. compounds.
2. elements.
3. mixtures.
4. solutions.
Question #29
The
Explanation / Answer
18) option 4 that is 5 oxygen atoms
19)1. reactant.
21)5. cooking an egg
22)5. compounds
23)4. saccharin sweetner
24)3. g/mol
25)1. compounds.
29)4. solution.
30)4. solute.
31)1. physical
32)
the number of electrons in one atom of
carbon.
33)4. solubility.
34)4. concentration
35)2. suspension
36)1. saturated
37)5. solvent, solute
38)3. homogeneous and heterogeneous
39)
2. A pure substance can only be a homoge-
neous solution
40)3. Compounds are pure substances
41)3. mole
42)3. ionic.
43)1. covalent
44)2. ionic
45)3. covalent
46)3. upper right
47)3. triple
48)1. double
49)3. triple
50)2. non-metals.