Download Chem 30 Midterm Exam 1B

Chem 30 Midterm Exam 1B
Name___________________________________Section __________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What is the mass of 30.0 mL of a solution with a density of 1.60 g/mL?
A)
B)
C)
D)
E)
48.0 g
31.6 g
53.3 g
18.8 g
none of the above
2) A 35.0 mL sample of a liquid weighs 27.2 g. What is the density of the liquid?
A)
B)
C)
D)
E)
3)
-6°F
263°F
26°F
14°F
-18°F
4) 68°C is the same as
A)
B)
C)
D)
E)
2)
1.29 g/mL
0.777 g/mL
7.80 g/mL
0.952 g/mL
62.2 g/mL
3) What temperature is -10.°C on the Fahrenheit scale?
A)
B)
C)
D)
E)
1)
4)
321 K.
341 K.
205 K.
285 K.
158 K.
5) A sample of an experimental medication was calculated to contain 0.392 g of active drug. How
many milligrams is this?
A) 0.0392 mg
B) 3.92 × 10-1 mg
C) 392 mg
D) 3.92 × 10-4 mg
E) 3.92 × 103 mg
1
5)
6) What is the numerical value of (2.1 × 104 )(4.0 × 10-2 )?
6)
A) 8.4 × 10-8
B) 8.4
C) 8.4 × 102
D) 8.4 × 10-2
E) none of the above
7) In scientific notation, the number 0.0046 is expressed as
7)
A) 4.6 × 10-3 .
B) 46 × 10-1 .
C) 4.6 × 10-1 .
D) 4.6 × 10-2 .
E) 46 × 10-3 .
8) What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length?
Express this answer to the correct number of significant figures.
A)
B)
C)
D)
E)
11.69 cm
11.718 cm
11.7 cm
11.72 cm
12 cm
9) The maximum number of electrons in any orbital is ________.
A)
B)
C)
D)
E)
9)
1
2
3
4
5
10) How many electrons can occupy the shell having n = 2?
A)
B)
C)
D)
E)
8)
6
32
8
18
2
2
10)
11) What is the electron configuration of S?
A)
B)
C)
D)
E)
1s2 2s2 2p2
1s2 2s2 2p6 3s2 3p2
1s2 2s2 2p6 3s2 3p6 4s2 3d1
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p6
12) How many neutrons does an atom of
A)
B)
C)
D)
E)
11)
46
Ti have?
22
12)
24
68
46
22
0
13) The atomic number of an atom containing 47 protons, 47 electrons, and 60 neutrons is
A)
B)
C)
D)
E)
107.
47.
13.
154.
60.
14) An atom containing 29 protons, 29 electrons, and 34 neutrons has a mass number of
A)
B)
C)
D)
E)
15)
S
K
Si
Br
Mg
16) Which of the following elements is most likely to form an ion with a -1 charge?
A)
B)
C)
D)
E)
14)
29.
58.
34.
5.
63.
15) Which of the following elements is most likely to form an ion with a +2 charge?
A)
B)
C)
D)
E)
13)
Cl
Mg
S
Sc
Si
3
16)
17) What is the formula of the nitrate ion?
17)
A) NO3 -1
B) NO2 -1
C) NO 3D) NO3 2E) none of the above
18) What is the formula of the sulfite ion?
18)
A) SO4 2B) S 2C) HSO4 2-
D) SO3 2E) none of the above
19) An atom with a mass number of 58 and with 32 neutrons will have ________ protons.
A)
B)
C)
D)
E)
19)
16
90
26
32
58
20) What is the numerical value of
1.50
1.222 × 103
? Express your answer using the correct number of
20)
significant figures.
A) 1.23 × 10-3
B) 1.227 × 10-3
C) 1 × 10-3
D) 1.2 × 10-3
E) 10-3
21) Which of the following numbers contains four significant figures?
A)
B)
C)
D)
E)
0.23010
230,110
23,011.0
0.0230100
0.002301
4
21)
22) What is the formula for calcium phosphate?
A)
B)
C)
D)
E)
22)
Ca4(PO3 )3
Ca3(PO4 )2
Ca2PO4
Ca2(PO3 )3
Ca3PO4
23) One definition of an acid is a substance that provides which ion in water solution?
23)
A) NH4+
B) H+
C) Na+
D) OHE) none of the above
24) Which group contains only elements which normally exist as diatomic molecules?
A)
B)
C)
D)
E)
helium; neon, argon
oxygen; phosphorus, germanium
nitrogen; oxygen, fluorine
hydrogen; lithium, sodium
nitrogen; sulfur, bromine
25) If SiCl4 is named as a covalent compound, what would it be called?
A)
B)
C)
D)
E)
24)
chlorosilicate
silicon tetrachloride
silicon chloride
sulfur tetrachloride
sulfur chloride
5
25)