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Semester Review

Total questions: 56

Worksheet time: 54mins

Name
Class
Date
1.
H2O, CH4, NaCl are all examples of chemical
a)
formulas
b)
properties
c)
changes
d)
bonds
2.
How many protons does an atom of Carbon have?
a)
6
b)
4
c)
12
d)
14
3.
In the formula, MgCl2, what does the 2 tell you?
a)
Chlorine has 2 valence electrons
b)
Chlorine has a 2+ charge
c)
Chlorine has a 2- charge
d)
There are 2 Chlorine atoms
4.
What does a neutralization reaction produce?
a)
an acid
b)
a base
c)
salt and water
d)
sugar and water
5.

The first aid measures section of the MSDS provides information like:

a)

what to do in case of exposure to skin, eyes, or inhalation

b)

how to prevent exposure

c)

what to do if the substance catches on fire

d)

what to do if the substance is spilled

e)

how to store the substance

6.

Which subatomic particle is counted to determine the type of element the atom represents?

a)

proton

b)

neutron

c)

electron

d)

boron

7.

HBr has a difference in electronegativity of 0.7. Based on the table, what kind of bond is HF?

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

8.

Atomic number 11 is

a)

Ar

b)

K

c)

Na

d)

Ti

9.
What is the charge on a lithium atom that looses 1 electron?
a)
+1
b)
0
c)
-1
d)
-2
10.
What is the volume of the water in this graduated cylinder?
a)
21 mL
b)
23.5 mL
c)
22 mL
d)
21.5 mL
11.
Which periodic group has the smallest atomic radius?
a)
Alkali metals
b)
Halogens
c)
Noble Gases
d)
Transition metals
12.
What is the name of K3PO4?
a)
Tripotassium Phosphate
b)
Tripotassium Phosphite
c)
Potassium phosphide
d)
Potassium phosphate
13.
What is the name of NH4Cl?
a)
nitrogen tetrahydrogen chloride
b)
ammonium chlorine
c)
ammonium chloride
d)
ammonium chlorate
14.

What are the steps for finding the Average Atomic Mass?

a)

1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Add

b)

1) % to decimal, 2) write given %, 3)write given mass, 4) Mass x abundance decimal 5) Add

c)

1) write given mass, 2) write given %, 3) % to decimal, 4) Mass divided by abundance decimal 5) Add

d)

1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Subtract

15.
Covalent bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
16.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
17.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

18.
Approved eye protection devices (such as goggles) are worn in the laboratory
a)
to improve vision
b)
only if you don't wear glasses
c)
anytime heat, chemicals, or glassware are used
d)
to avoid eye strain
19.

How many significant digits in the number 3.10 seconds?

a)

1

b)

2

c)

3

d)

infinite

20.

How many significant digits in the number 1500 mL?

a)

2

b)

3

c)

4

d)

infinite

21.

Formula for barium sulfide

a)

B2S3

b)

BaS

c)

Ba2S

d)

BaS2

22.

Name for PBr2

a)

phosphorus bromide

b)

phosphorus dibromide

c)

phosphorus dibromine

d)

phosphorus bromine

23.

What is the name of FeCl₂?

a)

iron chloride

b)

iron (II) chloride

c)

iron (I) chloride

d)

iron dichloride

24.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
25.
Write a complete balanced reaction for the following.
Calcium metal reacts with oxygen gas to form a solid
a)
2 Ca (s) + O2 (g) --> 2 CaO (s)
b)
2 Ca (s) + 2 O (g) --> 2 CaO (s)
c)
Ca (s) + O2 (g) --> 2 CaO (s)
d)
Ca (s) + O2 (g) -->  CaO2 (s)
26.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
27.
Which has the greater EN: 
Cl or Al?
a)
Cl
b)
Al
28.
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. 
29.

when atom gain an electron (negative) the size of atom

a)

Increase

b)

Decrease

c)

No change

d)

Small

30.

Name the compound: (NH4)2S

a)

ammonium sulfide

b)

nitrogen tetrahydrogen sulfide

c)

diammounium sulfate

d)

ammonium sulfate

31.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
32.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
33.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
34.

Hydrocarbon fuel + oxygen ----> ___+____

(Select 2)

a)

CO2

b)

O2

c)

H2O

d)

CxHy

35.
Write a Balanced Equation for this reaction:
C2H4 + 2 O2 -->
a)
C2O2 + H4
b)
CO2 + HOH
c)
CO + H
d)
2 CO2 + 2H2O
36.
What type of reaction is this?
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
a)
Single Replacement
b)
Double Replacement
c)
Combustion
d)
Decomposition
37.
The molar mass of an element is equal to its...
a)
Atomic mass
b)
Atomic number
c)
Oxidation number
d)
Valence electrons
38.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
39.
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
40.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
41.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

42.

In the unbalanced reaction of Al + Pb(NO3)2 ----> Pb + Al(NO3)2 select the cations with the correct charge?

a)

Al +1 and (NO3) -2

b)

Al +3 and Pb +4

c)

Al +1 and (NO3) -1

d)

Al +3 and Pb +2

43.

The following is what type of reaction:

PbCl2 + AgNO3 → Pb(NO3)2 + AgCl

a)

Single Replacement

b)

Double Replacement

c)

Neither Single or Double Replacement

44.

3Ca + 2AlCl3 --> 3CaCl2 + 2Al

a)

Single Replacement

b)

Double Replacement

c)

Neither Single or Double Replacement

45.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
46.
Molly investigated if the age of students caused them to be better drivers. What is the dependent variable?
a)
Type of car
b)
Skill of driving
c)
Age of student
47.
This variable in an experiment is the one being deliberately changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
48.
The part of the experiment that remains the same for the control and experimental group.
a)
constants
b)
control
c)
independent
d)
dependent
49.
Jessie estimates the weight of her cat to be 8 pounds.  The actual weight of the cat was 10 pounds.  Find the percent error.  
a)
15%
b)
20%
c)
25%
d)
30%
50.
Volume?
a)
63.5 mL
b)
63 mL
c)
63.55 mL
d)
6 mL
51.
volume?
a)
48 mL
b)
48.2 mL
c)
48.25 mL
d)
4 mL
52.

Which Student is the most Precise?

a)

Alex

b)

Shandra

c)

Luis

53.

Where are the numbers for a mole ratio found?

a)

They are part of the chemical formulas for the reactants / products.

b)

They are given in the problem.

c)

They are found on the periodic table for those elements.

d)

They are found as coefficients in the reaction's balanced chemical equation.

54.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
55.
How many grams are in 3.3 mol of Potassium Sulfide?
a)
360 g
b)
454 g
c)
238 g
d)
132 g
56.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe

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