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Chem Unit 9 Review

Total questions: 50

Worksheet time: 2hrs 49mins

Name
Class
Date
1.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)

Synthesis 

b)

Decomposition

c)

Single Replacement

d)

Combustion

2.
3Mg + N2 --> Mg3N2
a)

Synthesis 

b)

Decomposition

c)

Single Replacement

d)

Combustion

3.
2NO2 --> N2 + 2O2
a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

4.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
5.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
6.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
7.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
8.
Balance this equation:
 __Li + __Cl2 -> __LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li +  Cl2 -> 2LiCl
9.
C4H12 + O2 --> CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
10.
H2SO4 + Fe -->H2 + FeSO4
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
11.
PbCl2 + AgNO3 ---> Pb(NO3)2 + AgCl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
12.
NH3 + HCl ---> NH4Cl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
13.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
14.
Which of the following are PRODUCTS?
H2O + CO2 → HCO + HO
a)
H2O and CO2
b)
HCO and HO
c)
H2O ONLY
d)
HCO ONLY
15.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
16.

Predict the products, before balancing.

Co2(SO4)3 + NaOH -->

a)

CoOH + NaSO4

b)

CoNa + OH(SO4)3

c)

Co2OH + Na(SO4)3

d)

Co(OH)3 + Na2SO4

e)

no reaction

17.

What are the products for this combustion reaction:

C2H4 + 2 O2 -->

a)

C2O2 + H4

b)

CO2 + HOH

c)

CO + H

d)

CO2 + H2O

18.

Predict the products for the this Double Replacement reaction:

AgNO3 + KCl →

a)

AgCl + KNO3

b)

AgK + ClNO3

c)

KAg + NO3Cl

d)

AgCl + 3 KNO

19.

Predict the type of the following reaction.


3KOH + H3PO4 -->

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

20.

Predict the products of the following reaction. No need to balance.


F2 + KBr →

a)

FBr + K

b)

KF + Br

c)

KF2 + Br2

d)

KF + Br2

21.

If an element is diatomic it should have a subscript of___

a)

1, always

b)

2, only when it is an element

c)

it shouldn't have a subscript, it should have a coefficent

d)

2, when bonded in a compound

22.

What is the charge of Iron in this compound. (Hint: think swap drop method):

Fe3(PO4)2

a)

3+

b)

2+

c)

1+

d)

6+

23.

The symbol for a substance dissolved in solution is ______

a)

(s)

b)

(l)

c)

(aq)

d)

(g)

24.

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO3 → Ag + _____

a)

Cu(NO3)2

b)

CuNO3

c)

CuAg

d)

Cu

25.

Predict the products for the this Single Replacement reaction:

K + HCl →

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

HCl + K2

26.

Complete the balanced equation for this Double Replacement reaction.

3 NaOH + Fe(NO3)3 →

a)

NaFe + OH(NO3)3

b)

NaNO3 + Fe(OH)3

c)

3 NaNO3 + Fe(OH)3

d)

3 NaFe + 3 (OH)NO3

27.

Predict the products for the this Single Replacement reaction: (Copper has a charge of 1+)

Mg + CuCl →

a)

MgCl2 + Cu

b)

Mg + Cu

c)

MgCu + Cl2

d)

MgCl + Cu2

28.

The two sides of a chemical equation are called?

a)

Reactants (left) and Products (right)

b)

Ingredients (left) and Product (right)

c)

Cations and Anions

d)

Products (left) and Reactants (right)

29.
What does the Law of Conservation of Mass state?
a)

Mass cannot be gained or lost in a chemical reaction.

b)

Mass can only be lost in a chemical reaction.

c)

Mass can only be gained in a chemical reaction.

d)

Mass can be gained and lost in a chemical reaction. 

30.
___C3H8 +___O2 --> ___CO2 + ___H2O
a)
1,5,3,4
b)
2,10,6,8
c)
already balanced
d)
1,5,5,4
31.
__Al + __Fe3N2 -->__AlN + __Fe
a)
already balanced
b)
4,2,4,6
c)
2,1,2,3
d)
1,2,1,3
32.
NH4NO3
a)
soluble
b)
insoluble
33.
AgCl
a)
soluble
b)
insoluble
34.
Based on the activity series, will this reaction occur?
Br2 (l) + KI (aq) →
a)
Yes
b)
No
35.
Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →
a)
Yes
b)
No
36.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

37.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

38.

In the reaction Zn + 2HCl --> ZnCl2 + H2

which element, if any, is oxidized?

a)

Zinc

b)

Hydrogen

c)

Chlorine

d)

None

39.

In the neutralization reaction:

HCl + NaOH → NaCl + H2O

the NaOH is an example of a/an

a)

Oxidation

b)

Acid

c)

Reduction

d)

Base

40.

In the neutralization reaction:

HCl + NaOH → NaCl + H2O

the HCl is an example of a/an

a)

Oxidation

b)

Acid

c)

Reduction

d)

Base

41.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


Li2S + 2AgNO3 → 2LiNO3 + Ag2S

a)

Yes, and LiNO3 formed a precipitate.

b)

Yes, and Ag2S formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

42.

Which of the following is a balanced equation for representing the decomposition of Aluminum Oxide?

a)

2 Al2O3 → 3 O2 + 4Al2\ Al_2O_{3\ }\rightarrow\ 3\ O_{2\ }+\ 4Al  

b)

 Al2O3 →  O2 + 2Al\ Al_2O_{3\ }\rightarrow\ \ O_{2\ }+\ 2Al  

c)

 Al2O3 → 3 O+ 2Al\ Al_2O_{3\ }\rightarrow\ 3\ O+\ 2Al  

43.
What letter represents the activation energy?
a)
A
b)
B
c)
C
d)
D
44.

What letter represents the energy of the reactants?

a)

A

b)

B

c)

C

d)

F

45.

What letter represents the energy of the products?

a)

B

b)

C

c)

E

d)

F

46.

A pot of 2400.g of water at a temperature of 25.00˚C is heated on a stove until the water boils (100.0˚C).  The specific heat of water is 4.184 J/(g˚C).
Determine the heat energy needed to heat the water in the pot to boiling.

a)
133.76J
b)
43,062.2J
c)
752,400J
d)
1,003,200J
47.
The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?
a)
1.17 J/g°C
b)
-1.17 J/g°C
c)
0.857 J/g°C
d)
-0.857 J/g°C
48.

Name this acid with the formula HF

a)

hydrofluoric acid

b)

hypofluoric acid

c)

hydrogen fluorine acid

d)

fluoric acid

49.

Name this acid: HNO2

a)

hydronitrous acid

b)

hydrogen nitrogen oxygen

c)

nitrous acid

d)

hyponitrous acid

50.

I have a balloon that can hold 100. liters of air. If I blow up this balloon with 3.00 moles of oxygen gas at a pressure of 1.00 atmosphere, what is the temperature of the balloon?

Remember: PV=nRT R = 0.0821 (L atm)/ (mol K)

a)

400 K

b)

2.74 K

c)

406 K

d)

3 K

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