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Final Review1: Reactions,Stoichiometry and Gases

Total questions: 40

Worksheet time: 2hrs 0mins

Name
Class
Date
1.
Which is the name of the kind of solid substance formed in this figure?  
a)
aqueous 
b)
precipitate
c)
acid
d)
synthesis 
2.
Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas this happens because? 
a)
Magnesium is higher on the reactivity series then hydrogen
b)
magnesium is more reactive than hydrogen
c)
magnesium is able to break the bond between HCl and form MgCl2
d)
both b and c are correct
3.
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
4.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
5.
What are the correct coefficients when this equation is balanced?
KClO3  --> KCl  +  O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
6.
Which half reaction shows the element being reduced.  In the following reaction. 
2Na   +   Cl2  --> 2NaCl
a)
Na0   --> Na+1   +   1e-
b)
Cl20  +  2e-  --> 2Cl-
c)
Na0  +  1e- --> Na+1  
d)
Cl20 --> 2Cl-  + 2e-
7.
Identify this type of reaction,
Cl2 + 2KI -->  I2 + 2KCl
a)
Synthesis
b)
Single displacement
c)
Double displacement
d)
Decomposition
8.
2 C5H5 + Fe --> Fe(C5H5)2 
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
9.
2 RbNO3 + BeF2 --> Be(NO3)2 + 2 RbF
a)
single displacement
b)
double displacment
c)
decomposition
d)
synthesis
10.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
11.
A white baking soda solution was combined with white calcium chloride. Once combined the temperature increased, the substances bubbled, and were white in color. What indicators of a chemical change were shown?
a)
Temperature increase
b)
Color change
c)
Bubbling/fizzing
d)
Temperature increase and bubbling/fizzing
12.
Translate the following word equation: 
Liquid nitrogen and oxygen gas combine to form nitrogen monoxide gas. 
a)
N + O → NO
b)
N2 + O2 → N2O2
c)
N2(l) + O2(g) → NO(g)
d)
N(l) + O2(g) → NO(g)
13.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
14.
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
15.
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)
10.1 mol
d)
4.5 mol
16.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
17.
 SiO2 + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
a)
96 g
b)
0.67 g
c)
2.67 g
d)
48 g
18.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
19.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
20.
4 Al + 3 O2 –> 2 Al2O3  How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
21.

Which of the following is an assumption of the kinetic-molecular theory of gases?

a)

Collisions between gas particles are inelastic.

b)

Gases consist of closely spaced particles.

c)

Gas particles move around in an orderly manner.

d)

The temperature of a gas depends on the average kinetic energy of the gas particles.

22.

If a gas has the same temperature throughout, which gas molecule has the highest average velocity?

a)

O2

b)

H2O

c)

H2

d)

Xe

23.

Which among the following is true about Kinetic Molecular Theory?

a)

Gases do not move in straight line.

b)

Most of the volume of gas is empty space.

c)

Gas particles are not in constant random motion.

d)

Gas particles attract each other.

24.

Which of the following is not one of the assumptions of the kinetic molecular theory for ideal gases?

a)

The particles attract and then repel each other.

b)

The collisions between particles are elastic

c)

The particles are in constant random motion.

d)

The particle size is very small compared to the space between the particles.

25.

"STP" in chemistry is the abbreviation for:

a)

Stone Temple Pilots

b)

Standard Temperature and Pressure

c)

Scientifically Treated Petroleum

d)

Space Test Program

26.

"STP" is equal to the following:

a)

273 K, 1 atm

b)

22 K, 1 atm

c)

0 K, 273 atm

d)

273 C, 760 mmHg

27.

Pressure is caused by:

a)

Gas molecules colliding with surfaces

b)

Gas molecules reacting with each other

c)

Gas molecules colliding with each other

d)

Gravity

28.

At a constant pressure, the volume decreases. What happens to the temperature?

a)

increases

b)

decreases

c)

stays the same

29.
A gas that has a pressure of 2 atm and a volume of 10 L.  What would be the new volume if the pressure was changed to 1 atm?
a)
P1/T1 = P2/T2
b)
P1V1 = P2V2
c)
V1/n1 = V2/n2
d)
PV = nRT
30.

A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?

a)

2.1 L

b)

5.0 L

c)

8.2 L

d)

3.9 L

31.

A sample of gas containing 8.1 moles at STP would fill a container of what volume?

a)

342 L

b)

703 L

c)

475 L

d)

182 L

32.

A student inflates a balloon with helium then places it in the freezer. The student should expect

a)

the balloon's volume to increase

b)

the balloon's volume to decrease

c)

the balloon's moles to increase

d)

the balloon's moles to decrease

33.

The pressure of a 6.5 L sample of oxygen gas is measured to be 3.8 atm. If the gas is transferred into a 12 L tank, what is the new pressure?

a)

6.6 atm

b)

3.9 atm

c)

4.5 atm

d)

2.1 atm

34.

What is the pressure of a car tire that had an initial pressure of 1.8 atm but was heated from 38°C to 123°C?

a)

0.9 atm

b)

2.1 atm

c)

1.6 atm

d)

3.4 atm

35.

Three gases are mixed together in a container with a total pressure of 4.8 atm. If two of the gases have pressures of 1.2 atm and 1.5 atm, what is the pressure of the third gas?

a)

2.5 atm

b)

1.8 atm

c)

2.1 atm

d)

1.3 atm

36.

What is the volume of a balloon that contains 3.7 moles of helium at 75°C and 5.1 atm?

a)

37 L

b)

13 L

c)

45 L

d)

21 L

37.

A student places four gases into a container. The pressures of the gases are: N2=2.1 atm, H2=1.3 atm, He=1.9 atm & Ar=3.4 atm. What is the total pressure?

a)

5.1 atm

b)

8.7 atm

c)

7.4 atm

d)

6.9 atm

38.

What pressure is required to compress 196.0 liters of air at 1.00 atmosphere into a cylinder whose volume is 26.0 liters?

a)

7.54

b)

0.133

c)

0.0385

d)

1.96E-4

39.

A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume at 132.0°C?

a)

1215

b)

667

c)

135

d)

4400

40.

Diffusion and effusion are very similar. what answer best describes the process of effusion ?

a)

movement of particles from Low concentration to high concentration

b)

Movement of gas molecules based on their molar mass

c)

Spreading of gas molecules that become evenly distributed

d)

Passing of molecules through a small opening

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