Chemistry 121
Exam 1 Practice
Fall 2008
Exam 10/20/08
The following examination contains 35 questions worth 3 points each
Name ______________________________________________
The information listed below may be useful
°F = 1.8°C + 32 Density (water) = 1.00 g/ml
K =  C + 273
1 qt. = 946 ml
Density (ethanol) = 0.79 g/ml 1 cm = 2.54 inches
1 kg = 2.20 pound 1 ton = 2000 pounds
SH water
= 1 cal/g• o C
SH
Cu
= 0.092 cal/g•
Heat of fusion, water = 80 cal/g o C
Heat of vaporization, water = 540 cal/g
1.
Which of the following is not a physical process? a.
Rain falling b.
Rain freezing c.
Sliding on ice d.
Bursting into flame
2.
Which of the following is the symbol for sodium? a.
S b.
Ni c.
Si e.
Na
3.
Which of the following is the symbol for neon? a.
N b.
Na c.
Ne d.
Ni

4.
How many significant figures are in 320.0 g? a.
1 b.
2 c.
3 d.
4 e.
5
5.
How many milligrams are in a 1.0 kg? a.
1.0 x 10 b.
1.0 x 10
3
6
mg
mg c.
1.0 x 10 9 mg d.
1.0 x 10 12 mg
6.
Express 320.0 g in scientific notation.
3.200 x 10 2
7.
How many sig. fig.s are in the evaluation of (1.0 x 10 6 + 14.64 x 10 6 ) a.
2 b.
3 c.
4 d.
5
8.
A metric ton is 1000 kg. A British ton is 2000 pounds. What is the
difference in mass between a British and metric ton? a.
2.2 pounds b.
200 pounds c.
220 pounds d.
1000 pounds

9.
The largest recorded mass ever recorded for an elephant was 1.2 x
10 4 kg. What was this in British ton units?
13.2 Ton
10.
What is the volume of a solution that has a mass of 90.0 g and a density of 3.60 g/mL? a.
324 mL b.
32.4 mL c.
25.0 mL d.
2.50 mL
11.
How many moles of CO
2
are in 88.0 g CO dioxide is 44.0 g/mole?
2
if the molar mass of carbon a.
0.200 b.
0.500 c.
2.00 d.
5.00
12.
Natural gas (CH
4
) liquefies at 112 o a.
-129 b.
-161
K. What is this in o F? c.
-258 d.
-290
13.
How many calories are required to raise the temperature of 10.0 kg copper (Cu) from 0 o C to 100.0 o C? a.
9.2 x 10 3 cal b.
9.2 x 10 4 cal c.
9.2 x 10 5 cal d.
9.2 x 10 6 cal

14.
What will be the final temperature if 1.00 x 10 3 cal of heat is added to 1.00 kg ice water 1 ? a.
0.00 o C b.
1.00 o C c.
10.0 o C d.
1.00 x 10 2 e.
1.00 x 10 3 o o
C
C
15.
Which of the following would best describe the heat transfer that occurs when someone eats ice cream? a.
Evaporation b.
Radiation c.
Conduction d.
Convection
16.
Fill in the following table:
Particle
Proton
Neutron
Electron
Charge
+1
0
-1
Mass
1
1
Ca. 0
17.
What is the difference between mass number and atomic number?
Mass # = p + n; Atomic # = p
18.
How many neutrons are in 81 Br?
Bromine is element 35. 81 – 35 = 46
1 Water just at the freezing point – no ice

19.
Which element has a mass number of 41 and 22 neutrons?
41 – 22 = 19 Potassium
20.
Which of the following elements are non-metals? Block in all members.
Locate and exclude the metalloids –everything to the right. Make certain you include H
21.
Which of the following elements are the alkaline earth metals? Block in all members.
All group II members
22.
Which of the following is the correct order of increasing electronegativity? a.
Br < I < F < Cl b.
Cl < F < I < Br c.
I < Br < Cl < F d.
F < Cl < Br < I
23.
Which of the following is cationic? a.
Na in NaHCO
3 b.
O in NaHCO
3 c.
H in NaHCO
3 d.
C in NaHCO
3

24.
Which of the following is not a covalent compound? a.
CO
2 b.
CCl
4 c.
CaCl
2 d.
HCl gas
25.
Draw the Lewis dot structure for P and S
P has one pair of electrons in one orbital, and a single electron in the other 3 orbitals; S has one pair of electrons in 2 orbitals, and a single electron in the other 2 orbitals
26.
Draw the Lewis structure for Methyl amine (CH
(CH
4
O). Include non-bonded pairs of electrons.
5
N) and methanol
H
H C
H
N
H
H
H
H C
H
O
H
Drawing program does not allow lone pairs of electrons to be shown
27.
Draw the Lewis structure for methane (CH
4
) and ammonia (NH
3
).
Include non-bonded pairs of electrons.
H
H C
H
H H N
H
H
28.
Which is more polar, methane or ammonia? Briefly rationalize your answer.
Ammonia – nitrogen is to the right of carbon, so it has a higher electronegativity. As a result it pulls more electrons towards it from
H, polarizing the molecule

29.
What is the formula of the compound that forms when calcium reacts with iodine?
CaI
2
30.
What is the formula of the compound that forms when potassium reacts with sulfur?
K
2
S
31.
What is the name of Li
2
O? Lithium Oxide
32.
What is the name of SrO? Strontium Oxide
33.
What is the name of CuCl
2
?
2 Copper(II) chloride
34.
What is the name of Ca(NO
3
)
2
? Calcium Nitrate
35.
What is the name of CuNO
3
? Copper(I) Nitrate
2 Cu is the chemical symbol for the transition metal copper