WorksheetsChem for Life 2nd Semester Exam Review
Total questions: 55
Worksheet time: 28mins
Name
Class
Date
1.
100 cm = ________ km
a)
100,000
b)
10,000,000
c)
0.001
d)
0.0001
2.
Carbon dioxide and water are ALWAYS products of a combustion reaction.
a)
True
b)
False
3.
Which of the following occurs in an covalent bond
a)
two atoms share two or more electrons
b)
oppositely charged ions attract
c)
electrons are donated and accepted
d)
like-charged ions attract
4.
Battery acid is a strong acid what is a possible pH for it?
a)
7
b)
2
c)
12
d)
5
5.
Bleach is a strong base what is a possible pH for it
a)
7
b)
12
c)
2
d)
5
6.
A substance that will change color in the presence of an acid or a base is known as a (n)
a)
weak base
b)
indicator
c)
strong acid
d)
buffer
7.
Pure water is considered to be neutral, what is it's pH
a)
12
b)
7
c)
5
d)
2
8.
A solution has a pH of 6.5 and another solution is added causing the pH to lower to 6.3. What type of solution was added?
a)
a buffer
b)
an indicator
c)
an acid
d)
a base
9.
This is an ion or compound that produces H⁺ ions, when dissolved in water?
a)
ion
b)
isotope
c)
base
d)
acid
10.
This is an ion or compound that produces OH⁻ ions, when dissolved in water?
a)
acid
b)
ion
c)
isotope
d)
base
11.
Bobby has a glass of cherry Kool Aid with ice, what is the solvent in the solution?
a)
sugar
b)
water
c)
tea
d)
ice
12.
In a solution, the substance that is being dissolved is the _______.
a)
liquid
b)
solute
c)
solvent
d)
gas
13.
For gases dissolving in liquids, an increase in temperature _______.
a)
increases solubility
b)
decreases solubility
c)
does not change solubility
d)
makes solutions less concentrated
14.
A solution that contains all the solute it can hold at a given temperature is _____
a)
dilute
b)
saturated
c)
unsaturated
d)
supersaturated
15.
Rock Candy is made by saturating boiling water with sugar, then allowing the water to cool. What type of solution is formed when the solution is cooled?
a)
unsaturated
b)
supersaturated
c)
saturated
d)
syrup
16.
The amount of solute that can be dissolved in a specific amount of solvent at a given temperature is its _____.
a)
concentration
b)
dilution
c)
density
d)
solubility
17.
If pressure increases and volume decreases, they have this type of relationship.
a)
direct
b)
inverse
c)
positive
d)
reverse
18.
0°C is converted to what number in Kelvin (K)?
a)
173
b)
100
c)
273
d)
373
19.
Which of the following is a unit that measures volume?
a)
liters
b)
mm Hg
c)
psi
d)
atm
20.
Which of the following is a unit that measures pressure?
a)
atm
b)
psi
c)
mm Hg
d)
kPa
e)
all of these choices
21.
If pressure and temperature both increase they have this type of relationship.
a)
direct
b)
reverse
c)
negative
d)
inverse
22.
What is the mass of angelsite (PbSO₄)?
a)
399.6
b)
303.3
c)
192.4
d)
271.2
23.
What is the % composition by mass of Pb in angelsite? HInt: Use prior question to solve.
a)
68.3%
b)
146%
c)
51.9%
d)
21.1%
24.
How many moles of H₂O are there in 80 grams of H₂O?
a)
4.44 moles
b)
444 moles
c)
0.225 moles
d)
1440 moles
25.
Which compound is the least solubility at 50°C?
a)
NH₃
b)
NaCl
c)
KClO₃
d)
KCl
26.
What compound can dissolve 70 grams of solute at 90°C?
a)
KClO₃
b)
KCl
c)
NaCl
d)
NH₄Cl
27.
Which compound’s solubility is least affected by temperature?
a)
KCl
b)
NaCl
c)
NH₄Cl
d)
KClO₃
28.
At 15°C how much KI will dissolve in 200 g of H₂O? Hint: Pay attention to the amount of water.
a)
140 g
b)
280 g
c)
70 g
d)
210 g
29.
What is the percent by mass concentration of 70 g acetic acid dissolved in 130 g of water?
a)
35%
b)
0.53%
c)
53%
d)
0.35%
30.
What is the percent concentration by volume of alcohol in a solution that contains 500 mL of alcohol with 100 mL of water?
a)
0.83%
b)
1.67%
c)
83%
d)
5%
31.
What is the Molarity of a solution that contains 0.5 moles of NaCl in 2 L of H₂O?
a)
1 M
b)
25 M
c)
4 M
d)
0.25 M
32.
What is the Molarity of a solution that contains 20.0 grams of NaOH dissolved in .5 L of H₂O? (HINT: calculate grams to moles first.)
a)
0.25 M
b)
40M
c)
0.025 M
d)
1M
33.
A container has 72 liters of gas held at a pressure of 3.4 atm and a temperature of 225 K, how many moles (n) of gas is this? PV = nRT where R = 0.08206 (L)(atm)/(K)(mol)
a)
13.3 moles
b)
11.2 moles
c)
0.13 moles
d)
0.075 moles
34.
A 2.50 L balloon at 298 K has its temperature lowered to 280 K. What will be the new volume of the balloon?
a)
2.35 L
b)
2.67 L
c)
2.8 L
d)
2.5 L
35.
A container holds 4 liters of helium at 546 K. What will be the new volume if the temperature is cooled to 273?
a)
0.5 L
b)
1 L
c)
1.5 L
d)
2.0 L
36.
A container holds 2 L of nitrogen and is at a pressure of 4 atm. What will the new volume be when the pressure is increased to 8 atm?
a)
0.5 L
b)
1.5 L
c)
1 L
d)
2.0 L
37.
A sample of gas in a rigid container is at a pressure of 1 atm. It is heated from 15°C to 30°C. What will the new pressure be? Hint: Use the correct temperature units for gases.
a)
1.1 atm
b)
1.0 atm
c)
2.0 atm
d)
0.5 atm
38.
Identify the dependent variable
a)
graph
b)
pressure
c)
volume
39.
What type of relationship does this graph represent?
a)
inverse
b)
direct
c)
normal
d)
reverse
40.
Identify the independent variable
a)
graph
b)
pressure
c)
volume
41.
Petroleum is considered a non-renewable resource because
a)
it is organic
b)
it is used for fuel
c)
it cannot be replaced as quickly as it is used
d)
it is a hydrocarbon
42.
The greatest use of petroleum is
a)
making flavoring for foods
b)
making plastics
c)
fuel
d)
clothing
43.
Using fossil fuels can create problems in the environment because
a)
burning fossil fuels produces carbon dioxide, which contributes to the greenhouse effect
b)
burning fossil fuels creates chlorofluorocarbons which contribute to the greenhouse effect
c)
burning fossil fuels is illegal in many states and can result in legal problems
d)
burning fossil fuels depletes (reduces) the food supply for wild animals
44.
The following picture of Methyl propane represents what kind of molecule?
a)
straight chain alkane
b)
branched chain alkane
c)
ring alkane
d)
none of these choices
45.
The term 'saturated' is used to describe an alkane because
a)
they will dissolve in water
b)
they do not have the maximum number of hydrogen-carbon bonds
c)
they have the maximum number of hydrogen-carbon bonds
d)
they have too many hydrogen atoms
e)
they have too few hydrogen atoms
46.
The term 'unsaturated' is used to describe an alkene because
a)
they will dissolve in water
b)
they have too few hydrogen atoms
c)
they have too many hydrogen atoms
d)
they do not have the maximum number of hydrogen-carbon bonds
e)
they have the maximum number of hydrogen-carbon bonds
47.
How many valence electrons does carbon have?
a)
2
b)
4
c)
6
d)
8
48.
When atoms share three pairs of electrons then this type of bond is known as a
a)
double bond
b)
single bond
c)
triple bond
d)
ionic bond
49.
Which of the following is NOT a form of exothermic energy?
a)
burning a match
b)
burning a candle
c)
combustion
d)
melting ice
50.
Identify the image below as one of the following
a)
alkane
b)
alkene
c)
alkyne
51.
Identify the image below as one of the following
a)
alkane
b)
alkene
c)
alkyne
52.
Identify the structure below.
a)
alkane
b)
alkene
c)
alkyne
53.
Identify the structure.
a)
alkane
b)
alkene
c)
alkyne
54.
Johnson is enjoying a glass of ice water after running her daily 3 miles. She wonders if her students understand why the ice, although a solid, is floating in the water... Johnson is confident that her students will say that Ice floats because _________.
a)
ice is more dense than water.
b)
Ice is the same density of water.
c)
Ice is less dense than water.
55.
How many grams are in 1.18 moles of NaCl?
a)
69.03 g
b)
0.02 g
c)
49.4 g
d)
41.9 g
100 %
