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Worksheets

Spring Semester Exam

Total questions: 53

Worksheet time: 2hrs 53mins

Name
Class
Date
1.
What is the molar mass of Mg3N2?
a)
191.6 g/mol
b)
76.64 g/mol
c)
38.32 g/mol
d)
100.95 g/mol
2.
How many moles of carbon atoms are there in 5g of carbon?
a)
60 mol
b)
17 mol
c)
0.42 mol
d)
7 mol
3.
What is the mass(grams) of 16 moles of Mg(NO3)2?
a)
148.3 g
b)
2372.8 g
c)
9.27g
d)
864 g
4.

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?

__Ca + __H2O --> __Ca(OH)2 + __H2

a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
5.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
6.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
7.
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
8.
Cl2 + 2KBr → Br2 + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
9.
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
10.
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
11.
A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL?
a)
Pt = P1 + P2 + P3 + ...
b)
P1V1 = P2V2
c)
V1/T1 = V2/T2
d)
P1V1/T1 = P2V2/T2
12.
A container has 0.504 moles of a gas at a volume of 2680 mL.  When the number of moles changes to 0.423 moles, what is the new volume?
a)
PV = nRT
b)
V1/n1 = V2/n2
c)
P1V1/T1 = P2V2/T2
d)
P1V1 = P2V2
13.
The gas in the container is at a pressure of 3.00 atm at 298 K.  What would be the pressure in the container at 325 K?
a)
P1/T1 = P2/T2
b)
P1V1 = P2V2
c)
V1/T1 = V2/T2
d)
PV = nRT
14.
If the total pressure is 0.99 atm, and the partial pressure of carbon dioxide and hydrogen sulfide is 0.05 atm and 0.02 atm respectively.  What will be the partial pressure of the remaining air?
a)
P1V1 = P2V2
b)
Pt = P1 + P2 + P3 + ...
c)
PV = nRT
d)
P1/T1 = P2/T2
15.
What is 50 C in Kelvin?
a)
223
b)
323
c)
100
d)
50
16.
In order to convert to Kelvin, you add ______ to the Celsius measurement.
a)
372
b)
273
c)
237
d)
732
17.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
18.
what a solute dissolves in
a)
solvent
b)
mixture
c)
solute
19.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
20.
Which solute does not increase in solubility as temperature rises?
a)
NH3
b)
NaNO3
c)
KNO3
d)
NaCl
21.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
22.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
23.
When 42 grams of potassium chloride, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
24.

Which of the following formulas is a BASE?

a)

HCl

b)

H2SO4

c)

NaOH

d)

HNO3

25.

Which of the following formulas is an ACID?

a)

Ca(OH)2

b)

KOH

c)

NH4OH

d)

HCl

26.

Classify the following:


H2SO4

a)

acid

b)

base

c)

neither

27.

Classify the following:


NaCl

a)

acid

b)

base

c)

neither

28.

Classify the following:


NaOH

a)

acid

b)

base

c)

neither

29.

Lemon juice has a pH of 2. What is it best classified as?

a)

acid

b)

base

c)

neutral

30.

Human blood has a pH of 7. How is it best classified?

a)

acid

b)

base

c)

neutral

31.

Milk of magnesia has a pH of 10. What is it best classified as?

a)

acid

b)

base

c)

neutral

32.

What do we use to measure the strength of acids and bases?

a)

indicators

b)

pH scale

c)

netrualization

d)

acid rain

33.

Given the equation:

H2SO4 + H2O ↔ H3O+ + HSO4- 1

What is the acid?

a)

H2SO4

b)

H2O

c)

H3O+

d)

HSO4- 1

34.

Given the equation:

H2SO4 + H2O ↔ H3O+ + HSO4- 1

What is the conjugate acid?

a)

H2SO4

b)

H2O

c)

H3O+

d)

HSO4- 1

35.

Given the equation:

H2SO4 + H2O ↔ H3O+ + HSO4- 1

What is the conjugate base?

a)

H2SO4

b)

H2O

c)

H3O+

d)

HSO4- 1

36.

Given the equation:

H2SO4 + H2O ↔ H3O+ + HSO4- 1

What is the base?

a)

H2SO4

b)

H2O

c)

H3O+

d)

HSO4- 1

37.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
38.
What does temperature measure?
a)
Heat
b)
ºC
c)
Kinetic Energy
d)
Thermal Energy
39.

How does heat flow?

a)

Always from cold to hot

b)

Always from hot to cold

c)

Both hot to cold & cold to hot

d)

It depends on the temperature

40.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
41.
If 200 grams of water is to be heated from 24.0° C to  100.0° C to make a cup of tea, what is the mass and what is the change in temperature?
a)
m=200g
∆t= 66
b)
m=200g
∆t=124
c)
m=200
∆t=100
d)
m=200g
∆t=76
42.

For an endothermic reaction, there is heat on the ____ side

a)

reactant

b)

product

c)

either side

43.

For an exothermic reaction, there is heat on the _______ side

a)

reactant

b)

product

c)

either side

44.

This diagram is exothermic. Why?

a)

products are always at a lower energy compared to the reactants

b)

Products are always at a higher energy compared to the reactants

c)

Reactants are always the same as the products

d)

Whaaaaattttttttt?????

45.

During an endothermic reaction in a beaker if we touched the beaker, it would feel _______.

a)

Warm

b)

Cold

c)

Bubbly

d)

Damp

46.

During an exothermic reaction in a beaker if we touched the beaker, it would feel _______.

a)

Warm

b)

Cold

c)

Bubbly

d)

Damp

47.
A material was cooled from 100ºC to 40ºC.  What is the temperature change?
a)
60ºC
b)
40ºC
c)
-60ºC
d)
-40ºC
48.
Energy and heat travels from the sun to the Earth via what type of heat transfer?
a)
Conduction
b)
Radiation 
c)
Convection 
49.
The arrows in the tea pot represent what type of heat transfer?
a)
Conduction
b)
Convection
c)
Radiation 
50.
Using the picture provided, what type of heat transfer is shown looking at the pancake in the pan.
a)
Radiation
b)
Convection 
c)
Conduction 
51.
What type of heat transfer method occurs when heat travels through a fluid, such as a gas or liquid.
a)
Conduction 
b)
Convection 
c)
Radiation 
52.
What type of heat transfer method occurs when heat moves through physical contact of two or between two materials.
a)
Conduction 
b)
Convection
c)
Radiation  
53.
What type of heat transfer method occurs when heat moves through empty space?
a)
Conduction 
b)
Radiation  
c)
Convection 

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