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Chemistry Final Exam Review

Total questions: 45

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

What type of reaction is this?

Cl₂(g) + 2KBr(aq) → 2KCl(aq) + Br₂(l)

a)

Single Replacement

b)

Synthesis

c)

Double Replacement

d)

Combustion

2.

What is the mass of 4.55 mol of C2H6?

a)

0.151 g

b)

115 g

c)

137 g

d)

30.1g

3.

What's the mol ratio of CO2 to O2 according to the following chemical equation?

2C7H6O2(s) + 15O2(g) → 14CO2(g) + 6H2O(l)

a)

14 mol CO2 to 15 mol O2

b)

15 mol CO2 to 14 mol CO2

c)

14 mol CO2 to 2 mol O2

d)

15 mol CO2 to 6 mol O2

4.

How many valence electron does Beryllium have?

a)

1

b)

2

c)

0

d)

4

5.
Which is the correct name for the compound FeS?
a)
iron (II) sulfide (II)
b)
iron (II) sulfide
c)
iron (I) sulfide
d)
iron sulfide
6.
What is the formula for Hydrosulfuric Acid?
a)

H2SO3

b)

H2S

c)

H2SO2

d)

H2SO4

7.
What is the name of N2O3
a)
Nitrogen trioxide
b)
Dinitrogen oxide
c)
Dinitrogen trioxide
d)
Nitrogen oxide
8.

What is the formula for copper(II) chloride?

a)

CuCl2

b)

CuCl

c)

Cu2Cl

d)

Cu2Cl2

9.
Which element is a noble gas?
a)

krypton

b)

chlorine

c)

antimony

d)

manganese

10.
What is the total number of electrons in a Mg2+ ion?
a)

10

b)

2

c)

12

d)

24

11.

What are the coefficients that will balance the equation below?

AlCl3 + NaOH → Al(OH)3 + NaCl

a)

1,3,1,3

b)

3,1,3,1

c)

1,1,1,3

d)

1,3,3,1

12.

KNO3 ⟶\longrightarrow KNO2 + O2 What coefficients are needed to balance the reaction?

a)

2, 2, 1

b)

2, 3, 2

c)

1, 2, 2

d)

1, 3, 1

13.

Identify the reaction type:

C2H6 + O2 →\rightarrow CO2 + H2O

a)

Double replacement

b)

Synthesis

c)

Acid base

d)

Combustion

14.

What is the molar mass of Hydrogen Peroxide H2O2 ? Round to 4 significant figures.

a)

48.36 g/mole

b)

34.01 g/mole

c)

36.51 g/mole

d)

35.59 g/mole

15.
How many moles are in 16.94g of water?
a)

16.94 mol H2O

b)

0.9403 mol H2O

c)

305.3 mol H2O

d)

1.063 mol H2O

16.

2 NaClO3   →\rightarrow 2NaCl +3 O2   

12.0 moles of NaClO3 will produce how many grams of O2?

a)

256 g O2

b)

576 g O2

c)

288 g O2

17.

What type of reaction is this?

a)

Synthesis

b)

Single replacement

c)

Double replacement

d)

Decomposition

18.

Which type of reaction is shown?

a)

Single replacement

b)

Double replacement

c)

Combustion

d)

Decomposition

19.

A subatomic particle with no charge

a)

proton

b)

nucleus

c)

electron

d)

neutron

20.

Which of the following elements is in the same period as phosphorus?

a)

carbon

b)

magnesium

c)

oxygen

d)

bismuth

21.

What atom matches this electron configuration?

1s2 2s2 2p6 3s2

a)

Magnesium

b)

Neon

c)

Aluminum

d)

Potassium

22.

Name the compound Fe(NO3)2.

a)

Iron II Nitrate

b)

Iron II Nitrite

c)

Iron III Nitrate

d)

Iron III nitride

23.

The electron configuration of an element is [Kr] 5s2 4d6. To what group does this element belong?

a)

4

b)

5

c)

7

d)

8

24.

How many electrons does a Li+1 have?

a)

2

b)

3

c)

4

d)

5

25.

How many protons does this isotope of titanium have?

a)

48

b)

22

c)

26

d)

70

26.
How many significant figures does the following number have?
0.00345
a)

6

b)

5

c)

3

d)

4

27.

How many significant figures does the following number have:  1.100g

a)

6

b)

4

c)

3

d)

2

28.
Round 1289 to three significant figures
a)

1290

b)

130.

c)

1300

d)

1290.

29.

Solve and give your answer with the correct number of significant figures 12.470 ÷ 27112.470\ \div\ 271

a)

0.0460

b)

0.046015

c)

4.60x10-4

d)

3370

30.
Solve and give your answer with the correct number of significant figures
24.28 + 12.5
a)
3.687 x 101
b)
36.8
c)
37
d)
3.70x101
31.

How many electrons are in Gold

a)

79

b)

118

c)

197

d)

276

32.

How many protons are in Neon

a)

10

b)

20

c)

21

d)

30

33.

Which list of elements contains a metal, a metalloid, and a nonmetal?

a)

Zn, Al, Ge

b)

Si, Ge, Ag

c)

Ca, Sb, Cl

d)

F, Cl, Br

34.

Which element is classified as a non-metal?

a)

Be

b)

As

c)

Al

d)

H

35.
This element can be found in group 17 and period 4.
a)
Bromine
b)
Iodine
c)
Potassium
d)
Krypton
36.

Select the diatomic elements.

a)

Na

b)

Br

c)

O

d)

N

e)

He

37.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
38.

What atom matches this electron configuration? [Ne] 3s2

a)

Neon

b)

Magnesium

c)

Aluminum

d)

Potassium

39.

Calculate the molar mass of KOH. Round to the nearest whole number.

a)

28 g/mol

b)

56 g/mol

c)

84 g/mol

d)

112 g/mol

40.

Calculate the molar mass for Al(OH)3. Round to three significant figures.

a)

78.0 g/mol

b)

72.9 g/mol

c)

28.3 g/mol

d)

25.2 g/mol

41.

2H2  +   O2  →  2H2O

How many moles of oxygen are needed if 8 moles H2 are used?

a)

2 moles

b)

4 moles

c)

6 moles

d)

8 moles

42.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)

6.7 mol

b)

1.0 mol

c)

10. mol

d)

4.5 mol

43.

Using the following equation:

1 Fe2O3 + 3H2 → 2Fe + 3H2O

How many grams of iron can be made from 3.00 moles of Fe2O3?

a)

335 g Fe

b)

423 g Fe

c)

112 g Fe

d)

198 g Fe

44.

4NH3 + 5O2  →\rightarrow 4NO + 6H2O How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 

a)

0.37g

b)

0.045g

c)

1.35g

d)

11.1g

45.

Which element is a transition metal?

a)

krypton

b)

chlorine

c)

antimony

d)

manganese

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