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01 Atomic Structure and Properties Part 2

Total questions: 107

Worksheet time: 5hrs 41mins

Name
Class
Date
1.
What is the percent by mass of magnesium in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
2.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
3.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
a)
SO
b)
SO2
c)
SO3
d)
SO4
4.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
5.
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
a)
K2SO4 
b)
K8SO16
c)
K8S4O8 
d)
K8S4O16 
6.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6? 
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L 
c)
1 mol = 6.02x 1023 particles 
d)
more than one
7.
Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO2?"
a)
1 mol = 22.4 L 
b)
1 mol = 44.01 g
c)
1 mol = 6.02x1023 atoms
d)
more than one
8.
Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?
a)
A
b)
B
c)
C
d)
D
9.
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
a)
setup B : 0.6644mol Co
b)
setup A: 2.41x1047mol Co
c)
setup A : 0.664mol Co
d)
setup B: 2.41x1047mol Co
10.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
11.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
12.

What is the formula for percent composition?

a)

Mass of element / Mass of compound

b)

Mass of compound / Mass of element

c)

Mass of element / Total Volume of Compound

d)

Total Volume of Compound / Mass of element

13.

What is the relationship between moles and mass in stoichiometry?

a)

1 mole of a substance is equal to its molar mass in grams

b)

1 mole of a substance is equal to its atomic mass in grams

c)

1 mole of a substance is equal to its molecular mass in grams

d)

1 mole of a substance is equal to its formula mass in grams

14.

How many atoms of each element are in a molecule of Mg(NO3)2?

a)

Mg: 1

NO : 2

b)

Mg: 1

N: 2

O: 5

c)

Mg: 2

N: 2

O: 6

d)

Mg: 1

N: 2

O: 6

15.

How many particles would be in 8.40 moles of Octane (C8H18)?

a)
5.77 x 1023
b)

5.06 x 1024

c)
5.77 x 1026
d)

5.06 x 1023

16.

The empirical formula for C6H14 would be:

a)

C6H14

b)

CH

c)

C12H28

d)

C3H7

17.

How many hydrogen atoms are in 3 molecules of C3H7O?

a)

3

b)

21

c)

3 (6.02 * 1023)

d)

7

18.

How many molecules are in 16.94 g of water?

a)

7.040 x 1025 molc H2O

b)

0.94 molc H2O

c)

305.30 molc H2O

d)

5.661 x 1023 molc H2O

19.

Using percent composition, how many grams Fe could be separated from 10 grams of FeO?

a)

10.00 g

b)

7.77 g

c)

2.22 g

d)

0.78 g

20.
Find the percent composition of Cu2S?
a)

%Cu= 67

%S= 33

b)

%Cu= 80

%S= 20

c)

%Cu= 50

%S= 50

d)

%Cu= 71

%S= 29

21.

You are given the following percentages: 66.72% S and 33.28% O. Find the empirical formula for these elements.

a)

SO

b)

SO2

c)

SO3

d)

SO4

22.

How many TOTAL atoms are in H2SO4?

a)
6
b)
5
c)
7
d)
3
23.
What is the correct formula for dinitrogen tetroxide?
a)
N₃O₃
b)
(N₂)₂(O₄)₃
c)
N₂O₄
d)
N₄O₂
24.
The chemical formula for an ionic compound of potassium and oxygen is
a)
KO.
b)
K2O.
c)
K2O2.
d)
KO2.
25.

What is the correct chemical formula for strontium acetate?

a)

SrC2H3O2

b)

Sr2C2H3O2

c)

Sr(C2H3O2)2

d)

Sr(C2H3O2)3

26.
What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?
a)
C3H8
b)
CH4
c)
C2H2
d)
C4H10
27.

What is the molecular formula of a compound with an empirical formula of C2OH4 and a molecular mass of 88 grams per mole?

a)

C2O4H8

b)

C8O2H4

c)

C4O2H8

d)

C4O8H2

28.

What below is NOT considered matter?

a)

Carbon atoms

b)

Gravity

c)

Bacteria

d)

Air

29.

What particle view below is a mixture?

a)

b)

c)

d)

30.

What is the best classification for this substance?

a)

An element

b)

A compound

c)

A mixture

31.

What is the best classification of this substance?

a)

An element

b)

A compound

c)

A mixture of 2 elements

d)

A mixture of 2 compounds

32.

What is an example of a physical property?

a)

Silver is shiny

b)

Alcohols are flammable

c)

Alkali metals are reactive with water

d)

Acids are sometimes corrosive

33.

What is an example of a chemical change?

a)

Tearing paper

b)

Dissolving salt in water

c)

Melting ice

d)

Burning wood

34.

Is this image showing a homogeneous or a heterogeneous mixture? Image: Cesar salad

a)

homogeneous

b)

heterogeneous

35.

Does this image represent a chemical or a physical change?

a)

Chemical change

b)

Physical change

36.

Does this image represent a chemical or physical change?

a)

Chemical change

b)

Physical change

37.

Which below shows a CHEMICAL change?

a)

b)

c)

38.
A substance with two or more elements that are combined in a fixed proportion
a)
colloid
b)
compound
c)
element
d)
solution
39.
A substance in which all the atoms are the same
a)
colloid
b)
homogeneous mixture
c)
solution
d)
element
40.
A mixture in which different materials can be identified easily
a)
element
b)
heterogeneous mixture
c)
homogeneous mixture
d)
solution
41.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
42.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
43.

Which of the following is an example of a pure substance?

(a)  
Choose from the below words
Air
Saltwater
Gold
Milk
44.

What is the smallest unit of an element that retains its chemical properties?

(a)  
Choose from the below words
Atom
Molecule
Compound
Ion
45.

Which of the following is a physical property of matter?

a)

Flammability

b)

Density

c)

Reactivity

d)

Toxicity

46.

What is the formula for density?

a)

Mass / Volume

b)

Volume / Mass

c)

Mass x Volume

d)

Volume - Mass

47.

Which of the following is an example of a compound?

a)

Oxygen

b)

Gold

c)

Water

d)

Helium

48.

What is the physical state of matter that has a definite volume but takes the shape of its container?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

49.

Which of the following is a characteristic of a gas?

a)

Definite shape

b)

Definite volume

c)

Particles close together

d)

Particles move freely

50.

Which of the following is an example of a physical change?

a)

Burning wood

b)

Mixing salt and water

c)

Rusting iron

d)

Melting ice

51.

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

a)

Element

b)

Compound

c)

Mixture

d)

Solution

52.

What is a type of mixture in which different parts can easily be seen (Ex. Vegetable soup)?

a)

Heterogeneous mixture

b)

Homogeneous mixture

c)

Solution

d)

Colloid

53.

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

a)

Element

b)

Compound

c)

Colloid

d)

Suspension

54.
What is a homogeneous mixture?
a)
a mixture that is the same throughout.
b)
a mixture that is made up of one type of atom.
c)
a mixture that is made up of one type of compound
d)
a mixture that cannot be separated through physical changes
55.
Which one of these pictures represents a mixture? 
a)
1
b)
2
c)
3
d)
1, 2 and 3
56.
If you change a substance into a new substance...
a)
Partial Change
b)
Physical Change
c)
Chemical Change
d)
Freezing
57.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
58.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
59.

Mercury is a liquid at room temperature metal with a density of 13.5 g/cm3.  Which of these metals would sink below the mercury if dropped into a container of mercury?

a)

gold (density=19.3 g/cm3)

b)

lead (density=11.4 g/cm3)

c)

iron (density=7.9g/cm3)

d)

aluminum (density=2.7g/cm3)

60.

What is the density of a liquid that has a mass of 27 g and a volume of 30 mL?

a)

0.9 g/ml

b)

3 g/ml

c)

57 g/ml

d)

810 g/ml

61.

If the density of a diamond is 3.5 g/cm3, what would be the mass of a diamond whose volume is 0.50 cm3?

a)

1.8 g

b)

7 g

c)

0.14 g

d)

4 g

62.
In general what is the most dense form of matter?
a)
solid
b)
liquid
c)
gas
d)
plasmas
63.
An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?
a)
9 g/mL
b)
10.5 g/mL
c)
6.5 g/mL
d)
8 g/mL
64.

Which box has a higher density?

a)

A

b)

B

c)

They are the same

65.

In the picture, the mass of the block is 200. g, the dimensions of the block are 6.0 cm by 4.0 cm by 5.0 cm.  What is its density?

a)

1.7 g/cm3

b)
13.33 g/cm3
c)
0.60 g/cm3
d)
 24000 g/cm3
66.

An object floats in liquids with a density of 2 g/ml, 1.5 g/mL and 1.0 g/mL. It sinks in a liquid with a density 0.5 g/mL. What could be an estimate of it's density.

a)

3.8 g/mL

b)

1.5 g/mL

c)

.75 g/mL

d)

2.2 g/mL

67.

Object B floats in water. The object is broken into 5 pieces and one of those pieces is placed into the water. What will the object do?

a)

sink

b)

float

c)

sink at first and then float

d)

float at first and then sink

68.

The volume of water in a graduated cylinder is 50 mL. A marble is placed in the cylinder and the volume goes up to 52 mL. What is the density if the mass of the marble is 1 gram?

a)

1.0 g/mL

b)

1.04 g/mL

c)

2 g/mL

d)

.5 g/mL

69.
Convert 5 cm to mm:
a)
5,000mm
b)
0.5 mm
c)
0.05 mm
d)
50 mm
70.
Where do we read the level of liquid in a graduated cylinder?
a)
The highest point the liquid touches
b)
The bottom of the meniscus
c)
Half way between, we make an educated guess and round it
71.

What is the volume of liquid in this graduated cylinder?

a)

43 mL

b)

40.3 mL

c)

43.0 mL

d)

44.0 mL

72.

What is the volume of the liquid in the cylinder?

a)

21.51 mL

b)

23.5 mL

c)

24.05 mL

73.
Is 4,000 mg greater than, less than, or equal to 4 g?
a)
greater than
b)
less than
c)
equal to
74.

Convert 0.0001 cL to mL.

a)

0.01 mL

b)

0.00001 mL

c)

0.001 mL

d)

1 mL

e)

0.000001 mL

75.

50.3 kg is how many cg?

a)

5030

b)

5030000

c)

503

d)

50300

e)

0.000503

76.

What is the SI unit for length?

a)

meter

b)

mass

c)

length

d)

distance

77.

Jackie has a 1.8 m long piece of rope. She wants to cut it into 3 equal parts. How long should each piece be in millimeters?

a)

6 000

b)

600

c)

60

d)

6

78.

About a year ago, Joy weighed 86 kilograms. Now, she is 72,000 grams. How much mass in kilograms did she lose?

a)

0.14 kg

b)

1.4 kg

c)

14 kg

d)

0.014 kg

79.
What is the volume of the liquid in this graduated cylinder?
a)

19.0 mL 

b)

35.0 mL 

c)

24.1 mL 

d)
1.9 mL
80.
What is the scale on this graduated cylinder?
a)
.1 mL per line
b)
.2 mL per line
c)
.5 mL per line
d)
1 mL per line
81.
What is the volume of the liquid in this graduated cylinder?
a)
1.5 mL 
b)

15.0 mL 

c)
1.05 mL 
d)

0.15 mL

82.

What is the length of the object in millimeters (mm)?

a)

27.0 cm

b)

7.20 cm

c)

2.70 cm

d)

3 cm

83.

What is the length of the object in centimeters?

a)

3.40 cm

b)

4.30 cm

c)

3.50 cm

d)

3.4 cm

84.
What is the length of the screw?
a)

5 cm

b)

5.1 cm

c)

5.11 cm

d)

6.6 cm

85.

Determine the number of significant digits of 4.7500

a)

3

b)

4

c)

5

d)

6

86.

Determine the number of significant digits of 0.0080500

a)

2

b)

3

c)

8

d)

5

87.

Determine the number of significant digits of 1000.

a)

1

b)

2

c)

3

d)

4

88.

How do we measure B with 3 significant digits?

a)

9.2

b)

9.20

c)

9.25

d)

9.00

89.

How would you record measurement A?

a)

7.8

b)

7.82

c)

7.825

d)

7.90

90.

How many significant digits would you report in this measurement?

a)

1

b)

2

c)

3

d)

4

91.

Perform the following calculation and round the answer to the correct number of significant digits. 56,000/635 = ?

a)

88

b)

88.189

c)

88.2

d)

88.1

92.

Perform the following calculation and round the answer to the correct number of significant digits. 456 x 2.30 = ?

a)

1050

b)

1048

c)

1040

d)

1049

93.
Solve and round accordingly.
2.34 + 0.00523 - 0.310
a)
2.03523
b)
2.0352
c)
2.035
d)
2.04
94.

The correct scientific notation for this number is: 67,400,000

a)

6.74 x 107

b)

67.4 x 106

c)

6.74 x 10-7

d)

674 x 105

95.

What is the mass of a sample of CaBr2 that has 8.33 x 1023 atoms?

a)

10023 g CaBr2

b)

276 g CaBr2

c)

0.250 g CaBr2

d)

144 g CaBr2

96.

How many grams of chlorine are in 2.5 moles of MgCl2?

a)

88.6 g Cl

b)

44.3 g Cl

c)

7.1 g Cl

d)

177 g Cl

97.

How many potassium ions are in 201 grams of K2SO4?

a)

1.39 x 1024 ions K

b)

6.91 x 1023 ions K

c)

3.81 x 1022 ions K

d)

2.29 ions K

98.

What is the process of separating solid particles from a liquid by passing the mixture through a porous material called?

a)

Evaporation

b)

Distillation

c)

Filtration

d)

Condensation

99.
What determines the separation technique used for a mixture?
a)
The type of mixture
b)
The components of the mixture
c)
Both the type of mixture and the components of the mixture
d)
Neither the type of mixture nor the components of the mixture
100.

What separation technique does the picture show?

a)

Sieving

b)

filtering

c)

magnetic separation

d)

Distillation

101.

Distillation is a process used to separate a mixture of liquids based on different

a)

boiling points

b)

densities

c)

freezing points

d)

solubilities

102.

Differences in which property allow the separation of a sample of sand and seawater by filtration?

a)

concentration of ions

b)

volume of sample

c)

mass of sample

d)

particle size

103.

A mixture consists of sand and an aqueous salt solution. Which procedure can be used to separate the sand, salt and water from each other.

a)

Evaporate the water, then filter out the salt.

b)

Evaporate the water, then filter out the sand.

c)

Filter out the salt, then evaporate the water.

d)

Filter out the sand, then evaporate the water.

104.

Identify the substance in box B.

a)

element

b)

compund

c)

mixture

105.
Find the percent composition of hydrogen in (NH4)2S.
a)
11.8%
b)
41.1%
c)
47.1%
106.

How many moles are in 2.2x1024 atoms of argon?

a)

6.02x1023 moles

b)

1.3x1048 moles

c)

0.27 moles

d)

3.7 moles

e)

6.02x1023 formula units

f)

6.02x1023 compounds

g)

2.2x1024 atoms

h)

1 mole

i)

6.02x1023 atoms

j)

6.02x1023 molecules

1
2
3
4
1)
2)
3)
4)
107.

How many moles are in 7.211x1024 compounds of zinc (II) chloride (ZnCl2)?

a)

6.02x1023 moles

b)

4.341x1048 moles

c)

0.08348 moles

d)

11.98 moles

e)

6.02x1023 formula units

f)

6.02x1023 compounds

g)

7.211x1024 compounds

h)

1 mole

i)

6.02x1023 atoms

j)

6.02x1023 molecules

1
2
3
4
1)
2)
3)
4)

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