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Spring Chem Final

Total questions: 80

Worksheet time: 2hrs 35mins

Name
Class
Date
1.
Which substance has the greatest molecular mass?
a)
H2O2
b)
NO
c)
CF4
d)
I2
2.

N2 + 3H2 −-> 2NH3

How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?

a)

6 moles Ammonium

b)

1.5 moles ammonium

c)

9 moles ammonium

d)

9 moles hydrogen

3.
What is the number of moles of 112 liter chlorine gas at STP?
a)
3 mol
b)
4 mol
c)
5 mol
d)
6 mol
4.
What is the mass of 0.2 mol of Al? (Ag:27g/mol)
a)
27 g
b)
54 g
c)
5,4 g
d)
2,7 g
5.
Find the molar mass of C8H18.
a)
114 g/mol
b)
26 g/mol
c)
66 g/mol
d)
338 g/mol
6.
6.02x1023 is known as
a)
the address to get "free shavacado"
b)
Avogadro's number.
c)
Avocado's number.
d)
the genetic make up of Guacamole.
7.
What is the empirical formula for the following molecular formula: C6H14
a)
C6H14
b)
C3H7
c)
CH2
d)
CH3
8.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
9.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
10.
Determine the mass of 2.00 mols of nitrogen.
a)
0.143 g 
b)
28.0 g 
c)
1.20 x 1024 g
d)
3.32 x 10-24g
11.
Determine the mass of
1.4 x 1023 atoms of Chromium.
a)
7.3 x 1024 g
b)
0.23 g
c)
4.4 x 1048g
d)
12 g
12.
Determine the amount of moles in 1.50 x 1023 atoms of fluorine.
a)
9.03 x 1046 moles
b)
0.249 moles
c)
4.73 moles
d)
0.0131 moles
13.
Determine the number of atoms in 1.50 g of carbon.
a)
0.125 atoms
b)
7.52 x 1022 atoms
c)
1.08 x 1025 atoms
d)
2.07 x 10-25 atoms
14.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
15.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
16.
How many steps are in a gram to mole conversion?
a)
1
b)
2
c)
3
d)
4
17.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
18.
How many steps are in a gram to molecule conversion?
a)
1
b)
2
c)
3
d)
4
19.
Avogadro’s number represents the number of atoms in
a)
12g of C12 
b)
32g of oxygen
c)
 320g of sulphur
d)
12.7g of iodine 
20.
Which of the following weighs the most ?
a)
one g-of nitrogen atoms
b)
One mole of Cesium
c)
One mole of water
d)
One molecule of H2SO4
21.
What is the correct temperature on the Kelvin scale equal to 30oC?
a)
303K
b)
243K
c)
313K
d)
253K
22.
Using Gay-Lussac's law, if the pressure of a gas starts out at 200kPa and increases to 600kPa, what would the initial temperature be if it ended up at 300K?
a)
50K
b)
200K
c)
400K
d)
100K
23.
In order to convert to Kelvin, you add ______ to the Celsius measurement.
a)
372
b)
273
c)
237
d)
732
24.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
25.
Which of the following would increase the (gas) pressure of a system?
a)
Increase the Temperature
b)
Pump in more gas
c)
Decrease the volume
d)
All of these
26.
The following graph shows ____ relationship. 
a)
Direct
b)
Inverse
27.
Boyle's law :  The pressure and volume of a gas show a _____ relationship. 
a)
Inverse 
b)
Direct 
28.
In the ideal gas law, which variable represents the gas constant?
a)
n
b)
R
c)
T
d)
V
29.
A sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC.  What is the new volume of the gas?
a)
60.0 mL
b)
15.0 mL
c)
27.5 mL
d)
32.5 mL
30.
A sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?
a)
72 mL
b)
144 mL
c)
216 mL
d)
288 mL
31.
Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 
a)
0 K 
b)
107 K 
c)
207 K 
d)
307 K 
32.
A container is filled with H2, and H2O. Calculate the partial pressure of H2 when the pressure of water is 17torr. The total pressure of the gases is 750torr.
a)
767.5torr
b)
732torr
c)
42.86torr
33.
Determine the initial temperature of a random gas when the initial volume is 2.2 L and it is cooled to 88K with a volume of 0.85 L. 
a)
0.029 K
b)
0.021 K
c)
227.76 K
d)
34 K
34.
Gas Laws involve what three terms?
a)
Solid Liquid Gas 
b)
Speed Velocity Acceleration 
c)
Elements Compounds Mixtures 
d)
Pressure Temperature Volume 
35.
A balloon will pop in the atmosphere because..
a)
Pressure goes down volume goes up
b)
Pressure goes up volume goes down
c)
temperature goes down volume goes up
d)
volume goes down temperature goes down
36.
What is the relationship here?
a)
Pressure and Volume
b)
Volume and Temperature 
c)
Temperature and Pressure
d)
None they broke up weeks ago
37.
When the temperature is constant (k) inside a balloon, if you add pressure on it, the volume will ..... 
a)
Decrease
b)
Increase
c)
Not Change at all
d)
Particles will solidify 
38.
For example, if you increase the temperature of a gas inside a balloon, the balloon will....
[pressure is constant (k)]
a)
Expand (increase in volume)
b)
Deflate (decrease in volume) 
39.
Pick the best answer to explain all properties of gases....
a)
They're fluids 
Can be compressed
Little space between particles 
b)
They're solids 
Can be compressed
Lots of space between particles 
c)
They're fluids 
Cannot be compressed
Lots of space between particles 
d)
They're fluids 
Can be compressed
Lots of space between particles 
40.
Why does a car get low tire pressure in the COLD...what two variables are to blame? 
a)
Pressure and Temperature
b)
Temperature and Volume
c)
Volume and Pressure
d)
Temperature and Weight 
41.

Which would NOT increase the rate at which a sugar cube dissolves?

a)

Reducing the amount of solvent

b)

Crushing the sugar cube

c)

Stirring the solution

d)

Heating the solvent

42.

You can make a solute dissolve more quickly in a solvent by

a)

adding more solute.

b)

adding ice.

c)

heating the solvent.

d)

removing some solvent.

43.

A solution that contains all of the solute it can hold at a given temperature is

a)

diluted.

b)

saturated.

c)

supersaturated.

d)

unsaturated.

44.

Three 10 g samples of sugar are represented below.


Sample A dissolves in water more slowly than sample B.

Sample B dissolves more slowly than sample C.

Which of the following best explains why sample A dissolves more slowly than the other two?

a)

It has the most volume.

b)

It has the smallest surface area.

c)

It has the largest number of sugar molecules.

d)

It has the fewest bonds between sugar modules.

45.

A student pours mineral salts into a bottle of cold water. Which of the following best explains why shaking the bottle will affect the dissolving rate of the salt?

a)

Shaking exposes the salts to the solvent more quickly.

b)

Shaking helps more water evaporate.

c)

Shaking equalizes the water temperature.

d)

Shaking causes more ions to precipitate out of solution.

46.
The universal solvent is ______. 
a)
sodium 
b)
acid 
c)
water 
d)
wind 
47.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
48.
The concentration of a mixture can be increased in which of the following ways?
a)
Heating the mixture
b)
Adding more water “solvent”
c)
Adding more powder “solute”
d)
Stirring the mixture
49.
A solution that is considered dilute would be....
a)
Dark in color
b)
Have a strong scent
c)
Have a large amount of solute
d)
Have a small amount of solute
50.
salt water is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
51.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

52.

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt


Solution 2:

500 mL of water

60 g of salt

a)

Not enough information to tell

b)

Solution 1

c)

Solution 2

d)

They are equally diluted

53.
How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? 
a)
2
b)
3
c)
4
d)
6 
54.
Which sweet tea would you expect to taste the sweetest?
a)
1M
b)
3M
c)
3.1M
d)
2.5M
55.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?
a)
15.9 M
b)
0.636 M
c)
0.642 M
d)
1.59 M
56.
How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?
a)
27.8 mL
b)
27.78 mL
c)
2.8 mL
d)
278 mL
57.
Calculate the molarity of the following solution:  1.0 mole of KCl in 750.0 mL of solution.
a)
0.750 M
b)
99 M
c)
1.3 M
d)
2.0 M
58.

What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution?

a)

0.014 %

b)

1.4 %

c)

0.13%

59.

___________ refers to the amount of solute dissolved in a given amount per volume of solution

a)

Concentration

b)

Dilution

c)

Precipitation

d)

None of the above

60.

What is the percent by mass of a solution made by dissolving 10.0 g of NaCl into 180.0 g of water?

a)

5.26 %

b)

5.56 %

c)

180.0 %

d)

20.0 %

61.

Which of these pH values represent an acid?

a)

4

b)

8

c)

10

d)

12

62.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

63.

When an acid is dissolved in water, it turns red litmus paper blue.

a)

True

b)

False

64.

Which of the following is an acid?

a)

vinegar

b)

bleach

c)

sugar in water

d)

starch in water

e)

toothpaste in water

65.

Which of the following is a property of a base?

a)

bitter taste

b)

reacts with metals

c)

salty

d)

sour taste

66.

The higher the concentration of negative (hydroxide) ions in the solution, the stronger the base is.

a)

True

b)

False

67.

Ocean water is only slightly basic. What might its pH value be?

a)

5

b)

8

c)

12

d)

2

68.

Solutions that have more OH– ions than H+ ions are

a)

acids

b)

bases

c)

enzymes

d)

neutral

69.

Solutions that have more H+ ions than OH- ions are

a)

acids

b)

bases

c)

enzymes

d)

neutral

70.

A scientist runs tests on an unknown substance. He finds that it is extremely corrosive. It produces H+ ions in solution. And, it has a pH of 1. What type of substance has he identified?

a)

weak acid

b)

strong acid

c)

weak base

d)

strong base

71.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

72.

What type of solution is formed when the H+ ions equal the OH- ions?

a)

acidic

b)

basic or alkaline

c)

neutral

d)

enzymatic

73.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
74.
Which statement is true when acids and bases are mixed together?
a)
acids become stronger
b)
bases become stronger
c)
there is no change
d)
they neutralize each other
75.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
76.

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)

77.

HCl is found in household products, including some toilet bowl cleaners. Is HCl an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

78.

Water found near sources of air pollution tends to be:

a)

Acidic.

b)

Basic.

c)

Neither. Air pollution doesn't alter the pH of water.

79.
Carrie's teacher hands out test tubes filled with different chemicals and tells the students to identify their liquid as an acid, base, or neutral chemical. Carrie's test tube contains a clear chemical. She adds phenolpthalein to her test tube and gently moves the tube from side to side. A few moments later, the chemical in the test tube turns bright pink.
What type of chemical does Carrie have?
a)
Carrie has a neutral chemical.
b)
Carrie has an acidic chemical.
c)
Carrie has a basic chemical.
d)
The type of chemical Carrie has cannot be determined.
80.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic

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