Essays

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following statements about crystalline and amorphous solids is TRUE?
A) An example of a crystalline solid is glass.
B) An amorphous solid is composed of atoms or molecules with a majority of its volume empty.
C) A crystalline solid is composed of atoms or molecules arranged with long-range repeating order.
D) An example of an amorphous solid is table salt (NaCl).
E) All of the above statements are TRUE.
2) What are the possible orbitals for n = 3?
A) s
B) s, p, d
C) s, p, d, f
D) s, p
3)
A)
B)
C)
D)
E)

How many mg does a 433 kg sample contain?
4.33 × 10-4 mg
4.33 × 107 mg
4.33 × 108 mg
4.33 × 106 mg
4.33 × 10-3 mg

4) Gas is sold for $1.399 per liter in Toronto, Canada. credit card be charged in Canadian dollars?
A) $63.54

B) $16.79

C) $4.44

Your car needs 12.00 gallons.

How much will your

D) $67.15

5) Determine the final temperature of a gold nugget (mass = 376 g) that starts at 398 K and loses 4.85 kJ of heat to a snowbank when it is lost. The specific heat capacity of gold is 0.128 J/g°C.
A) 398 K

B) 133 K

C) 377 K

D) 187 K

E) 297 K

6) Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the following masses and natural abundances:
Ga-69
Ga-71

68.9256 amu
70.9247 amu

A) 69.80 amu

60.11%
39.89%

B) 70.00 amu

C) 69.72 amu

D) 70.68 amu

E) 69.93 amu

7) What species is represented by the following information? p+ = 12 n° = 14 e- = 10

A) Mg2+
8)
A)
B)
C)
D)
E)

B) Si

C) Mg

D) Ne

E) Si4+

Identify the charges of the protons, neutrons, and electrons. protons 0, neutrons +1, electrons -1 protons +1, neutrons 0, electrons -1 protons 0, neutrons -1, electrons +1 protons -1, neutrons 0, electrons +1 protons +1, neutrons -1, electrons 0

9) Determine the velocity of a marble (m = 8.66 g) with a