WorksheetsChemistry Exam 2 Review
Total questions: 58
Worksheet time: 2hrs 54mins
Name
Class
Date
1.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
2.
What is the mass in grams of 6.25 mol of copper (II) nitrate?
a)
126 g
b)
785 g
c)
625 g
d)
1172 g
3.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
4.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
5.
How many molecules are in 32.4 grams of phosphorous pentoxide?
a)
1.76 x 1023 molecules
b)
0.29 moles
c)
1.76 x 1022 molecules
d)
0.29 molecules
6.
36.0 g of Be contains how many moles?
a)
0.25 mol
b)
4.0 mol
c)
45 mol
d)
320 mol
7.
What is the percent by mass of sodium in NaCl?
a)
39%
b)
61%
c)
35%
d)
65%
8.
T/F
A compounds molecular formula can be the same as its empirical formula
A compounds molecular formula can be the same as its empirical formula
a)
True
b)
False
9.
What is the percentage of oxygen in carbon dioxide? (CO2)
a)
27.3%
b)
72.7%
c)
30%
d)
70%
10.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
11.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
12.
What is the relationship between enthalpies p, q, r and s?
S(s) + H2(g) -> H2S(g) ∆H=p
H2(g) + ½O2(g) -> H2O(l) ∆H=q
S(s) + O2(g) -> SO2(g) ∆H=r
H2S(g) + 1½O2(g) -> H2O(l) + SO2(g) ∆H=s
S(s) + H2(g) -> H2S(g) ∆H=p
H2(g) + ½O2(g) -> H2O(l) ∆H=q
S(s) + O2(g) -> SO2(g) ∆H=r
H2S(g) + 1½O2(g) -> H2O(l) + SO2(g) ∆H=s
a)
p = q + r – s
b)
p = s – q – r
c)
p = q – r – s
d)
p = s + r – q
13.
(Hess's Law)Calculate the ∆H for the following reaction: 2H2O2 → 2H2O + 1 O2
You are given these two equations:
2H2 + O2 → 2H2O ∆H = -572 kJ
H2 + O2 → H2O2 ∆H = -188 kJ
You are given these two equations:
2H2 + O2 → 2H2O ∆H = -572 kJ
H2 + O2 → H2O2 ∆H = -188 kJ
a)
∆H = -948 kJ
b)
∆H = -196 kJ
c)
∆H = -384 kJ
d)
∆H = -188 kJ
14.
What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?
a)
0.018 M
b)
0.0011 M
c)
1.052 M
d)
0.062 M
15.
Find the molarity of 186.55 g of sucrose, C12H22O11 (MM = 342) in 250 mL of water.
a)
2.18 M
b)
0.746 M
c)
1.18 M
d)
0.545 M
16.
True or False? The higher the concentration of a solution the less solutes it has in it.
a)
True
b)
False
17.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?
a)
15.9 M
b)
0.636 M
c)
0.642 M
d)
1.59 M
18.
Molarity is measured in
a)
moles per kg
b)
mols per L
c)
moles per kJ
d)
moles per mL
19.
What is the formula for molarity?
a)
moles/grams
b)
moles/kilograms
c)
moles/milliliters
d)
moles/liters
20.
Which of the following substances is a heterogeneous substance?
a)
baby oil
b)
rocky road ice cream
c)
salt water
d)
milk
21.
Which of the following substances is a homogeneous solution?
a)
chocolate chip cookie
b)
italian dressing
c)
apple juice
d)
orange juice
22.
When calculating molality, Kg of the following are included in the calculation?
a)
solvent
b)
solute
c)
none of these
d)
solvent & solute
23.
Which of the following types of solutions has more room to dissolve solute?
a)
supersaturated
b)
saturated
c)
unsaturated
24.
What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?
a)
2.0 M
b)
0.22 m
c)
135 m
d)
2.0m
25.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
26.
Another name for a homogeneous mixture is
a)
an element.
b)
a solution.
c)
a compound.
27.
What is the formula for nitric acid?
a)
HNO2
b)
HNO3
c)
HNO4
d)
H2NO3
28.
Name HF
a)
hydrofluoric acid
b)
Hypofluoric acid
c)
hydrogen fluorine acid
d)
fluoric acid
29.
Name the acid: H2SO3
a)
Sulfurous Acid
b)
Sulfuric Acid
c)
Hydrosulfuric Acid
d)
Hydrosulfurous Acid
30.
Hydroiodic acid
a)
H2I2
b)
H1I1
c)
HI
31.
Name the acid: HC2H3O2
a)
Acetic Acid
b)
Acetous Acid
c)
Hydrogen Acetate
d)
Hydrogen Dicarbon Trihydrogen Dioxygen
32.
chlorous acid
a)
HClO3
b)
HClO2
c)
HClO
d)
HCl
33.
Select the formula for the following acid: perchloric acid
a)
HClO4
b)
HClO3
c)
HClO2
d)
HCl
34.
Nitrate
a)
NO2-
b)
NO3-
c)
MnO4-
d)
NH4+
35.
The chemical formula of sulfur hexabromide is
a)
SBr₆
b)
S₆Br
c)
S(VI)Br
d)
S6Br
36.
The chemical formula of carbon tetrachloride is
a)
CCl
b)
C₄Cl
c)
CCl₄
d)
C(IV)Cl
37.
The chemical formula of dinitrogen textroxide is
a)
Ni₂O₄
b)
NiO
c)
N₂O₄
d)
NiO₂
38.
The name of P₄S₁₀ is
a)
phosphorous sulfide
b)
phosphorus sulfide
c)
tetraphosphorus decasulfide
d)
phosphorus (X) sulfide
39.
The name of SO₃ compound is
a)
sulfate
b)
sulfur oxide
c)
sulfur trioxide
d)
monosulfur trioxide
40.
What is the OFFICIAL name for H2O
a)
Hydrogen Oxide
b)
Oxygen Dinitride
c)
Agua
d)
Dihydrogen Monoxide
41.
How do the following two elements bond together?
Al3+ O2-
Al3+ O2-
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
42.
What is the formula for aluminum fluoride?
a)
AlF
b)
Al2F3
c)
AlF3
d)
Al3F2
43.
What is the formula for the the compound, hexaboron monosilicide?
a)
B5S
b)
BS6
c)
B6S
d)
BoS
44.
Is the following compound ionic or covalent:
Sr3P2
Sr3P2
a)
ionic
b)
covalent
45.
Name this compound:
BaBr2
BaBr2
a)
Monobarium Dibromide
b)
Barium bromide
c)
Barium bromate
d)
Boron bromite
46.
name the following ionic compound: NaF
a)
nitrogen fluorine
b)
sodium fluoride
c)
nitrogen fluoride
d)
sodium fluorine
47.
Name the following compound: FeCl3
a)
iron chloride
b)
iron III chloride
c)
iron chlorate
d)
iron III chlorate
48.
Name the following ionic compound: Cr(NO2)3
a)
chromium nitrite
b)
chromium nitride
c)
chromium III nitride
d)
chromium III nitrite
49.
Name the following ionic compound: Cs2S
a)
cesium sulfide
b)
cesium sulfate
c)
cesium II sulfate
d)
cesium II sulfide
50.
The proper formula for magnesium hydroxide is _____
a)
MgOH
b)
Mg2OH
c)
Mg(OH)2
d)
Mg2OH2
51.
What is the name of this polyatomic ion: MnO42-
a)
permanganate
b)
manganate
c)
manganese oxide
d)
manganese (IV) oxide
52.
The chemical formula of lead (IV) nitrate is
a)
PbN₄
b)
PbNO₃₄
c)
Pb(NO₃)₄
d)
Pb₃NO₄
53.
What is the formula for Calcium phosphide?
a)
CaP
b)
Ca2P3
c)
Ca3P2
d)
Ca2P
54.
What is the formula for Copper(I) Sulfate?
a)
CuSO3
b)
CuSO4
c)
Cu2SO3
d)
Cu2SO4
55.
Write the formula for Vanadium (IV) carbonate
a)
V(CO3)2
b)
V4C
c)
V(CO3)4
d)
V4(CO3)
56.
What is the name of the following ionic compound? Fe(NO3)2
a)
iron nitrate
b)
iron dinitrate
c)
iron(II) nitrate
d)
iron(I) nitrate
57.
What is the name of the compound with the formula FePO4?
a)
iron phosphate
b)
iron (II) phosphate
c)
iron (IV) phosphate
d)
iron (III) phosphate
58.
Write the formula for the following compound: magnesium carbonate
a)
Mg2C
b)
Mg2CO4
c)
Mg2(CO3)2
d)
MgCO3
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