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CHEM 1411 Exam I Extra Credit Review

Total questions: 80

Worksheet time: 2hrs 7mins

Name
Class
Date
1.

Italian salad dressing is a

a)

heterogeneous mixture

b)

homogeneous mixture

2.

Water is a(an)

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

3.

Aluminum is a(an)

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

4.

Granite is a(an)

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

5.
What type of matter is air?
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
6.

Melting an ice cube is a

a)

Chemical Change

b)

Physical Change

7.

Digesting food is a

a)

Chemical Change

b)

Physical Change

8.

Changing the density of cheese by melting it is a

a)

physical change

b)

chemical change

9.

Examples of chemical properties are:

a)

flammability (ability to burn)

b)

ability to react

c)

odor (how it smells)

d)

color

10.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
11.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
12.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
13.

Water's boiling point is 100°C. This is what type of property?

a)

physical property

b)

chemical property

14.

The ostrich is gray. What type of property is this?

a)

physical property

b)

chemical property

15.

Apples can react with oxygen and turn brown. What type of property is this?

a)

physical property

b)

chemical property

16.

The density of aluminium is 2.7g/cm3 is a(an)

a)

Extensive Property

b)

Intensive Property

c)

Chemical Property

17.
How many significant figures: 0.010 L
a)
1
b)
2
c)
3
d)
4
18.

Complete the following calculation. Report your answer with the correct number of significant figures.

52.6 g + 309.1 g +77.214 g

a)

438.9 g

b)

438.914 g

c)

438.91 g

d)

4.38914 x 102 g

19.

Complete the following calculation. Report your answer with the correct number of significant figures.

245.01 km x 2.1 km

a)

5.14521 x 102 km2

b)

5.1 x 102 km2

c)

51 km2

d)

514.521 km2

20.
How would you write 564,000,000 in scientific notation?
a)
5.64 x 10-7
b)
5.64 x 106
c)
5.64 x 108
d)
56.4 x 107
21.

Express the following in scientific notation:

0.0000002203

a)

2.203 x 107

b)

22.03 x 10-6

c)

2.203 x 10-7

d)

2.203 x 106

22.

82.4 °F = __?__ K

a)

301.15 K

b)

245 K

c)

401.15 K

d)

345 K

23.

The density of this material is 2.0 g/cm3.

The volume is 24.0 cm3. Find the mass.

a)

12 grams

b)

48 grams

c)

12.0 g/cm3

d)

48.0 g

24.

Convert 30.0 miles/hr to m/s.

1 mile = 1609 m

a)

13.4 m/s

b)

0.000052 m/s

c)

13.408 m/s

d)

48,000 m/s

25.

Convert 15 km/hr to m/s.

a)

15,000 m/s

b)

4.2 m/s

c)

4.17 m/s

d)

54,000,000 m/s

26.

Convert 0.085m to mm

a)

0.850 mm

b)

8.50 mm

c)

850 mm

d)

85 mm

27.

The standard temperature of boiling water is 100oC. Which thermometer is both accurate and precise? Click on the picture to enlarge it.

a)

1

b)

2

c)

3

d)

4

e)

None of them

28.
A neutral atom of Carbon-13 has ________ electrons and _________ neutrons
a)
13, 13
b)
6, 7
c)
7, 7
d)
6, 6
29.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
30.
Because atoms are neutral, the number of protons will be equal to the number of __________ in an atom.
a)
Positrons
b)
Neutrons
c)
Electrons
d)
Nuclei
31.

Identify letter A

a)

Nucleus

b)

Neutron

c)

Proton

d)

Electron

32.
Identify letter C
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
33.

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

a)

9.0, Beryllium

b)

12.01, Carbon

c)

6.94, Lithium

d)

10.8, Boron

34.

How many protons, electrons, and neutrons are in Se2-

a)

34 protons, 34 electrons, 34 neutrons

b)

36 protons, 36 electrons, 79 neutrons

c)

34 protons, 36 electrons, 45 neutrons

d)

34 protons, 36 electrons, 34 neutrons

35.

Rutherford's gold foil experiment provided evidence that...

a)

Negative and positive charges are spread evenly throughout the atom.

b)

Alpha particles have a positive charge.

c)

Gold is not a dense as previously thought.

d)

There is a dense positively charged nucleus at the center of an atom.

36.

What scientist is best known for his "Plum Pudding" model of the atom?

a)

J.J. Thomson

b)

Ernest Rutherford

c)

John Dalton

d)

Democritus

37.
Ernst Rutherford discovered which part of the atom through the use of gold foil?
a)
Proton
b)
Neutron
c)
Electron
d)
Orbitals
38.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
39.

Which statement is incorrect?

a)

The nucleus is very dense.

b)

The nucleus contains protons and neutrons.

c)

The nucleus is positively charged.

d)

The nucleus is involved in chemical reactions.

40.
An ______________ is the same element, with the same number of protons, but different numbers of neutrons
a)
Atom
b)
Isotope
c)
Atomic Number
d)
Mass Number
41.

Who determined the charge of an electron?

a)

Thomson

b)

Rutherford

c)

Millikan

d)

Chadwick

42.

Who discovered isotopes?

a)

Frederick Soddy

b)

James Chadwick

c)

Ernest Rutherford

d)

J.J. Thomson

43.

What is the charge on barium when it becomes an ion?

a)

1+

b)

2+

c)

2-

d)

1-

44.

LiBr is called

a)

lithium bromine

b)

lithium (I) bromine

c)

lithium bromide

d)

lithuim (I) bromide

45.

The name of FeCl₂ is

a)

iron chloride

b)

iron (II) chloride

c)

iron (I) chloride

d)

iron dichloride

46.

Name the ionic compound SnSe2

a)

Tin diselenide

b)

Tin (IV) Selenide

c)

Tin selenide

d)

Tin (II) triselenide

47.

Name the following ionic compound: BeCl2

a)

beryllium chlorine

b)

beryllium II chloride

c)

beryllium chloride

d)

beryllium dichloride

48.

Name the following ionic compound: Cs2S

a)

cesium sulfide

b)

cesium sulfate

c)

cesium II sulfate

d)

cesium II sulfide

49.

What is the name of the compound Na2(SO4)?

a)

Sodium sulfate

b)

Sodium sulfide

c)

Sodium sulfite

d)

Sodium sulfuroxide

50.

What is the name of the compound Sc(OH)3?

a)

Scandium (III) hydroxide

b)

Scandium (I) hydroxide

c)

Scandium (II) hydroxide

d)

Scandium hydroxide

51.

The name of the compound Ca3(PO4)2

a)

calcium phosphate

b)

tricalcium diphosphate

c)

calcium phosphorus oxide

d)

calcium phosphide

52.
AgF
a)
silver fluoride
b)
silver fluorine
c)
monosilver monofluoride
d)
silver monofluorine
53.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
54.
The proper formula for magnesium hydroxide:
a)
MgOH
b)
Mg2OH
c)
Mg(OH)2
d)
Mg2OH2
55.
Name the following ionic compound: LiNO3
a)
lithium nitrate
b)
lithium III nitrate
c)
lithium nitride
d)
lithium oxide
56.
The chemical formula of lead (IV) nitrate is
a)
PbN₄
b)
PbNO₃₄
c)
Pb(NO₃)₄
d)
Pb₃NO₄
57.

What is the formula for calcium phosphide?

a)

CaPO3

b)

Ca2P3

c)

Ca3P2

d)

Ca2P

58.
What is the formula for copper(I) sulfate?
a)
CuSO3
b)
CuSO4
c)
Cu2SO3
d)
Cu2SO4
59.

Name the following ionic compound: MgSO4*7H2O

a)

magnesium sulfite hexahydarte

b)

magnesium sulfate hexahydrate

c)

magnesium sulfate heptahydrate

d)

magnesium sulfite heptahydrate

60.

Na2CO3 · 10H2O is known as ______

a)

sodium carbonate decahydroxide

b)

disodium carbonate decahydrate

c)

sodium carbonate decahydrate

d)

None of the above

61.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
62.
silicon dioxide
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
63.
diphosphorus pentoxide
a)
P2O5
b)
PO5
c)
P5O2
d)
P2O6
64.
SiCl4
a)
silicon tetrachloride
b)
silicon quadchloride
c)
monosilicon tetrachloride
d)
silicon chloride
65.

What is the molar mass of AuCl3?

a)

96.00 g

b)

130.57 g

c)

232.45 g

d)

303.35 g

66.

Which represents the greatest mass of sulfur?

a)

1 gram of sulfur

b)

1 molecule of sulfur

c)

0.5 mole of sulfur

d)

6.022 x 1023 atoms of sulfur

67.

How many moles are present in 32.3 grams of carbon dioxide (CO2)?

a)

44.01 moles

b)

1421.52 moles

c)

32.3 moles

d)

0.734 moles

68.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
69.

How many water molecules are in 5.2 moles of water?

a)

6.02 x 1023 molecules

b)

5.2 molecules

c)

3.1 x 1024 molecules

d)

8.638 x 10-24 molecules

70.

What is the percent composition by mass of oxygen in the compound MgSO4 (formula mass = 120.38 g/mol)?

a)

20%

b)

27%

c)

46%

d)

53%

71.

How many grams are in 2.04 x 1022 CO molecules?

a)

0.949 g

b)

0.147 g

c)

0.00121 g

d)

3.44 x 1047 g

72.

A compound is 75.46% carbon, 4.43% hydrogen, and 20.10% oxygen by mass. It has a molecular weight of 318.31 g/mol. What is the molecular formula for this compound?

a)

C10H7O2

b)

C5H2O

c)

C2H4O2

d)

C20H14O4

73.

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45 g/mol)?

a)

0.625 g NaCl

b)

625 g NaCl

c)

36.5 g NaCl

d)

0.04 mol NaCl

74.
Which sweet tea would you expect to taste the sweetest?
a)
1M
b)
3M
c)
3.1M
d)
2.5M
75.

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250.0 mL?

a)

15.9 M

b)

0.636 M

c)

0.642 M

d)

1.59 M

76.
How many moles are needed to make 2.5 L of a 3.8 M solution? 
a)
9.5 mol
b)
0.66 mol
c)
1.5 mol
d)
15 mol
77.

What mass of solute is needed to make 100.0 g of a 3.4% solution?

a)

3.4 g

b)

34 g

c)

2941 g

d)

0.34 g

78.

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?

a)

0.58%

b)

0.577%

c)

5.8%

d)

0.00577%

79.

What is the concentration of a solution in parts per million if 0.020 grams of NaCl is dissolved in 1000.00 grams of water?

a)

2 ppm

b)

20. ppm

c)

200. pm

d)

0.2 ppm

80.

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt


Solution 2:

500 mL of water

90 g of salt

a)

Solution 1

b)

Solution 2

c)

They have the same concentration

d)

I have no idea

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