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FINAL EXAM

Total questions: 67

Worksheet time: 3hrs 49mins

Name
Class
Date
1.

Electronegativity is...

a)

how good an atom is at attracting electrons

b)

the ability of an atom to lose electrons

c)

the energy required to remove an electron from a specific atom

d)

how easy it is to make friends.

2.

Which atom has the largest atomic radius?

a)

potassium

b)

rubidium

c)

francium

d)

cesium

3.

The common charge on an atom in group 17 would be....

a)

+1

b)

+7

c)

-7

d)

-1

e)

17

4.

Which of the following is the term for a substance in which all the atoms have the same number of protons

a)

a compound

b)

An element

c)

a molecule

d)

a solid

e)

a gas

5.

Which of the following reasons explains why there is a decimal for most atomic masses?

a)

The mass of one atom can have a fraction.

b)

Since electrons are very small mass they only add a little bit, usually only a decimals worth.

c)

It is the average mass of all the potential isotopes of an atom.

d)

Neutrons have a mass of 1.1 meaning that fractions are common.

6.

The positive particles of an atom are ___________.

a)

electrons

b)

protons

c)

neutrons

7.

A particle that moves around the nucleus is called an _________.

a)

Proton

b)

Neutron

c)

Electron

d)

Quark

8.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

9.

Different isotopes have...

a)

different masses

b)

different protons

c)

different electrons

10.

The atomic weight represents the weighted average of the

a)

electrons

b)

isotopes

c)

protons

11.

What is the name of K3PO4?

a)

Tripotassium Phosphate

b)

Tripotassium Phosphite

c)

Potassium phosphide

d)

Potassium phosphate

12.

What is the name of Al(NO3)3?

a)

Aluminum trinitrate

b)

Monoaluminum nitrate

c)

Aluminum (III) nitrate

d)

Aluminum Nitrate

13.

Name the following ionic compound: Cr(NO2)3

a)

chromium nitrite

b)

chromium nitride

c)

chromium III nitride

d)

chromium III nitrite

14.

Name this compound:

Ca2CO3

a)

Calcium carbon oxide

b)

Calcium (II) carbonate

c)

Calcium carbonate

d)

Carbonate (I) calcide

15.

Name the Compound:

SnO2

a)

tin(II) oxide

b)

tin(IV)oxide

c)

tin(II)oxegen

d)

tin oxide

16.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

17.

Milk is generally:

a)

Slightly acidic and becomes more acidic over time.

b)

Basic, although it becomes more acidic over time.

c)

Milk is neither acidic nor basic.

d)

Basic and it becomes more basic over time.

18.
Ammonia has a pH of 12.  Ammonia is __________.
a)
an acid
b)
a base
c)
an element
d)
a metal
19.
What does a pH of 1 indicate about a liquid?
a)
it is a very strong base
b)
it is a weak base 
c)
it is a weak acid
d)
it is a strong acid
20.
If the [H+] of a solution is 1 x 10-2 mol/L the pH is
a)
2
b)
12
c)
-2
d)
1
21.
A  pH and a pOH will add up to:
a)
0
b)
7
c)
14
d)
1.0 x 10-14
22.
If the [OH-] of a solution is 2.7 x 10-4 mol/L the pOH of the solution is
a)
10.44
b)
3.56
c)
1.00
d)
-4.43
23.
if a solution has a pOH of 5.2 the [OH-] of the solution is
a)
6 x 10 -6 M
b)
6.3 x 10 -6 M
c)
1.58 x 10-5 M
d)
2 x 10-5 M
24.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
25.
diphosphorus pentoxide
a)
P2O5
b)
PO5
c)
P5O2
d)
P2O6
26.
The chemical formula of dinitrogen textroxide is
a)
Ni₂O₄
b)
NiO
c)
N₂O₄
d)
NiO₂
27.
Which of the following is NOT an ionic compound:
a)
CaO
b)
NaOH
c)
BaCl2
d)
Br2
28.
The ratio of an error to an accepted value
a)
percent error
b)
error
c)
precision
d)
accuracy
29.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
30.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
31.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
32.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
33.
How many steps are in a gram to mole conversion?
a)
1
b)
2
c)
3
d)
4
34.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5 moles
35.
How many steps are in a gram to molecule conversion?
a)
1
b)
2
c)
3
d)
4
36.
What is the mass of 0.89 mol of CaCl2?
a)
111 grams
b)
0.008 grams
c)
98.9 grams
d)
none of the choices
37.
What is the molar mass of fluorine gas?
(beware!)
a)
18.998 g/mol
b)
38 g/mol
c)
9 g/mol
d)
18 g/mol
38.
How many particles are in a mole?
a)
602
b)
602 million
c)
602 moles
d)
6.02 x 1023
39.
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
40.
A substance has a molecular formula of C8H10N4O2. The empirical formula is 
a)
CHNO
b)
C2H6N2O
c)
C4H5N2O
d)
C9H7N3O
41.
A compounds is made up of 30% nitrogen and 70% sulfur. The molar mass of the compound is 92 g/mol. What is the molecular formula for the compound?
a)
NS
b)
N2S2
c)
NS2
d)
N2S
42.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
43.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
44.
What is this element?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
45.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
46.
What is the highest occupied energy level?
a)
4
b)
5
c)
6
d)
7
47.
How many unpaired electrons would lithium have?
a)
1
b)
2
c)
3
d)
0
48.

When reacting Na with Cl2, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

49.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
50.
Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
a)
Fe
b)
S
c)
FeS
d)
none 
51.
C3H8 + 5O2 --> 3CO2 + 4H2O
How much carbon dioxide is produced when 3.0g of propane is burned in 2.1g of oxygen? 
a)
0.55g
b)
0.038g
c)
2.9g
d)
0.90g
52.
What is the mole ratio of H2O to H3PO4 in the following chemical equation?   P4O10 + 6 H2O --> 4 H3PO4 
a)
6:4
b)
4:6
c)
1:3
d)
3:1
53.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
54.
Look at this image.  Which object has the LOWEST density in water? How? 
a)
The Ping Pong Ball because it floats to the top 
b)
The bolt because it has sunk to the bottom
c)
The soda cap because it is not just full of air like the Ping Pong ball
55.
If an object has a density of .6 g/mL and you put it into water, will it sink or float?  
a)
sink
b)
float
56.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
57.

If the density of a diamond is 3.5 g/cm3 , what would be the mass of a diamond whose volume is .5 cm3?

Hint: density = mass/volume

a)

1.75 g

b)

7 g

c)

0.14 g

d)

4 g

58.

Milk is generally:

a)

Slightly acidic and becomes more acidic over time.

b)

Basic, although it becomes more acidic over time.

c)

Milk is neither acidic nor basic.

d)

Basic and it becomes more basic over time.

59.
An Arsenic atom wants to form...
a)
An anion
b)
A cation
c)
An onion
d)
A cuddly kitten friend
60.
NH4 +  and  OH -
a)
NH(OH)4
b)
NH4OH
c)
OHNH4
d)
correct answer not given
61.
Ga +3  and  PO4 -3
a)
GaPO4
b)
Ga4PO
c)
PO4Ga
d)
correct answer is not given
62.
K +  and  PO3 -3
a)
K3PO3
b)
KPO3
c)
K(PO3)3
d)
correct answer is not given
63.

A neutral atom of Magnesium (shown in image) will...

a)

Lose 2 electrons when it becomes an ion

b)

Gain 2 electrons when it becomes an ion

c)

Gain 6 electrons when it becomes an ion

d)

Lose 1 electron when it becomes an ion

64.

Group 13 (III) elements would...

a)

Gain 3 electrons when becoming ions

b)

Lose 3 electrons when becoming ions

c)

Gain 5 electrons when becoming ions.

d)

Lose 13 electrons when becoming ions.

65.
What two elements come together to make this substance in the picture?
a)
Oxygen and Carbon
b)
Sodium and Calcium
c)
Sodium and Chlorine
d)
Helium and Nitrogen
66.
As you move across the periodic table atoms tend to get smaller because, ______________.
a)
the atoms have more mass.
b)
the atoms have less mass
c)
the atoms have more protons.
d)
the atoms have less electrons.
67.
Vertical columns of elements (families) on the periodic table with similar  properties
a)
groups
b)
periods
c)
quadrants
d)
rows

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