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10 ADV Chemistry EOT 2 quiz

Total questions: 119

Worksheet time: 5hrs 2mins

Name
Class
Date
1.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
2.
The Law of Conservation of Matter states that the total mass of the reactants should be 
a)
More than the mass of the products
b)
Equal to the mass of the products
c)
Ignored during the reaction
d)
Less than the mass of the products
3.
In the following reaction, what sign is there that a precipitation reaction took place?
AgNO3 (aq) + NaOH (aq) → AgOH (s) + NaNO3 (aq)
a)
The formation of a nitrate
b)
The (aq), meaning aqueous or dissolved in water
c)
The (s), meaning the formation of a solid
d)
The base (OH) reactant 
4.
A + B → AB : is the general form for which reaction type?
a)
Double Replacement
b)
Synthesis
c)
Combustion
d)
Decomposition
5.
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
6.
Identify this type of reaction,
Cl2 + 2KI -->  I2 + 2KCl
a)
Synthesis
b)
Single Replacement
c)
Double Replacement
d)
Decomposition
7.
Which chemical reaction forms Carbon Dioxide and Water?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
8.
Which reaction type is the following: AgF + CaCl2 --> AgCl + CaF2
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Double Replacement
9.
Which reaction type is the following:  Na + CaF2 --> Ca + NaF
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Double Replacement
10.

Balancing this reaction:

____ CH4 + ____ O2 ---> ___ CO2 + ____ H2O

a)

2,1,3,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,1,1,2

11.

Balance this reaction:

____ NaF + ____ Br2 ---> ___ NaBr + ____ F2

a)

3,1,2,1

b)

1,2,3,4

c)

2,1,2,1

d)

1,2,1,2

12.

Balance this reaction:

____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF

a)

1,1,1,1

b)

1,2,1,1

c)

2,1,1,2

d)

2,1,2,1

13.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
14.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
15.
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a)
1,1,1,1
b)
1,2,1,1
c)
2,1,1,2
d)
2,1,2,1
16.
Which is the correct formula for the compound formed between beryllium and nitrogen?
a)
BeN
b)
Be3N
c)
Be3N2
d)
Be2N3
17.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
18.

Coal is burnt, food is digested in our body, iron nails when exposed to humid atmosphere for a long time rust; These ae examples of _______

a)

Chemical change

b)

Physical change

c)

Both

d)

None

19.

Magnesium can be burned in oxygen to produce solid magnesium oxide.

a)

Mg + O2→ MgO

b)

Mg+ O→ MgO

c)

Mg + CO2 → MgO + C

d)

Mg + O2→ Mg2O2

20.

Hydrogen gas and nitrogen monoxide gas forms water and nitrogen gas.

a)

H2 + NO --> H2O + N2

b)

H + NO --> H2O + N

c)

H2 + N2O3 --> H2O + N2

d)

H + NO --> H2O + N2

21.

sodium phosphate and calcium chloride produce calcium phosphate and sodium chloride

a)

Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl

b)

Na3PO4 + CaCl2 --> Ca4PO2 + NaCl

c)

NaPO4 + CaCl2 --> Ca(PO4)2 + NaCl

d)

NaPO4 + CaCl2 --> Ca2(PO4)3 + NaCl

22.

Aluminum bromide and chlorine gas produce aluminum chloride and bromine gas.

a)

AlBr3 + Cl2 --> AlCl3 + Br2

b)

AlBr3 + Cl --> AlCl3 + Br

c)

Al3Br + Cl --> Al3Cl + Br2

d)

AlBr3 + Cl2 --> AlCl3 + Br

23.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
24.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
25.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
26.
If a reaction starts with a total 75g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
27.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
28.
Evidence of a chemical reactions is anything that shows - 
a)
a new substance has formed
b)
a solid dissolved in a liquid
c)
interaction between 2 gases
d)
a change in the state of matter
29.
Which of the following is NOT evidence that that a chemical reaction has occurred?
a)
produces light/heat
b)
production of a gas
c)
formation of a precipitate
d)
melting
30.
What is a PRECIPITATE?
a)
When it rains.
b)
When a solid forms after 2 liquids mix and react. 
c)
When a solid forms after steam is produced. 
d)
When a solid forms after a liquid freezes. 
31.
In Elephant toothpaste, what evidence shows a chemical reaction took place?
a)
Formation of a solid
b)
Formation of a gas (oxygen)
c)
Formation of carbon dioxide 
d)
Formation of a gas (nitrogen) 
32.

What is evidence that a chemical reaction has occured?

a)

Shredding paper

b)

Blue & Red paint mixing to make purple paint

c)

a new gas is observed in the form of bubble

d)

a phase change occurs

33.

Which of the following are evidence(s) of a chemical change that you see in the picture? (Select all that are correct.)

a)

giving off light

b)

wood

c)

camping

d)

temperature change

34.

which one is chemical change?

a)

cutting an apple

b)

apple turning brown

c)

washing the apple

35.

This symbol indicates_____________

a)

reacts to yield

b)

beware of sharp edges

c)

a reversible reaction

d)

reactivity increases with items to

36.

This symbol indicates_____________

a)

reacts to yield

b)

beware of sharp edges

c)

a reversible reaction

d)

reactivity increases with items to

37.

The symbol (g) found beside a chemical formula indicates that the chemical is ___________________.

a)

stable in composition

b)

instable in composition

c)

in the gaseous state

d)

an organic sugar

38.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

39.

Based on the activity series, will this reaction occur?

Au (s) + HCl (l) →

a)

AuCl + H

b)

No Reaction

c)

AuCl + H2

d)

Au2Cl + H2

40.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

No Reaction

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

41.

A mixture contains cobalt, copper, and tin . This mixture is mixed with nickel nitrate. Which metals, if any, will react?

a)

Cobalt only

b)

Copper only

c)

Tin only

d)

All 3

42.

What will be the result of : Zn + AuCl2->

a)

ZnCl2 +Au

b)

ZnAu + Cl2

c)

no reaction

d)

ClAu + Zn

43.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

44.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

45.

What type of reaction is the following:
BaCl2+2KI −> 2KCl + BaI2BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

46.

What type of reaction is the following:
2NaHCO3−> Na2CO3+CO2+H2O2NaHCO_3->\ Na_2CO_3+CO_2+H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

47.
What precipitate forms when you mix lead (II) nitrate with sodium chloride?
a)
sodium nitrate 
b)
lead (II) chloride 
c)
sodium lead
d)
chloride nitrate 
48.
Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2?
a)
Ca2+(aq) +  2Cl- (aq) → CaCl(s)
b)
Ag+(aq)  +  Cl- (aq) → AgCl(s)
c)
Ag +  Cl  →  AgCl
d)
Ag+  +  Ca2+   →Ag2Ca (s)
49.
Which of the following does NOT form a precipitate?
a)
Pb(NO3)2(aq) + 2KI(aq) →
b)
Sr(NO3)2 (aq) + K2SO4(aq) →
c)
AgNO3(aq) + Na2S(aq) →
d)
 Pb(NO3)2(aq) + AgNO3(aq) →
50.
What are the spectator ions in this reaction?
CuCl2(aq) + NaOH(aq) → Cu(OH)2(s) + NaCl(aq)
 
a)
Cu2+ and OH1-
b)
Na2+ and Cl2-
c)
Na1+ and Cl1-
d)
Na1+ and OH1-
51.
Which of these results in the formation of a precipitate?
a)
AgNO3(aq)  +  NaOH(aq)→
b)
BaNO3(aq)  +  CaCl2(aq)→
c)
NaNO3(aq)  +  KOH(aq)→
d)
More than one of these form precipitates
52.

Which of the following shows the correct net ionic equation for the reaction of Ba(MnO4)2(aq) + (NH4)2SO4?

a)

Ba2+ + SO42- --> BaSO4

b)

2NH4+ + 2MnO4- --> 2NH4MnO4

c)

Ba + MnO4- --> Ba(MnO4)2

d)

2MnO4- + SO42- --> BaSO4

53.

What is the net ionic equation for the reaction between sulfuric acid and aqueous potassium hydroxide? (HINT: potassium sulfate (K2SO4) is aqueous)

a)

H+(aq) + OH-(aq) →  H2O(l)

b)

Η+(aq) + SO42-(aq) + 2K+(aq) +2OH-(aq) →  H2O(l) + 2K+(aq) + SO42-(aq)

c)

SO42-(aq) + 2K+ →  2K+  + SO42-(aq)

d)

SO42-(aq) + 2K+ →  K2SO4

54.

Which of the following is the complete ionic equation of the reaction between hydroiodic acid and aqueous lithium sulfide?

a)

2H+(aq) + S2-(aq) →  H2S(g)

b)

2H+(aq) + 2I-(aq) + 2Li+(aq) + S2-(aq) →  H2S(g) + 2Li+(aq) + 2I-(aq)

c)

2I-(aq) + 2Li →  2Li+ + 2I-(aq)

d)

2I-(aq) + 2Li →  2LiI

55.

The following equation is what type of reaction? KCN(aq) + HBr(aq) → KBr(aq) + HCN(g)

a)

deconstructive

b)

synthesis

c)

single replacement

d)

double replacement

56.
How many grams are in 4.0 moles of Lithium? Round your answer to correct sig figs. 
a)
27.76 g
b)
27 g
c)
27.8 g
d)
28 g
57.
The mass of one mole of a substance. 
a)
atomic mass
b)
molar mass
c)
Avagadro's mass
58.
The number of  particles are in one mole of a substance?
a)
mole number
b)
mass number
c)
molar mass
d)
Avagadro's number
59.
How many atoms are in 2.0 moles of oxygen? Round to correct sig figs.
a)
1.2 x 1024
b)
1.2 x 10-24
c)
3.3 x 10-24
d)
3.3 x 1024
60.
How many moles in 2.64 grams of Beryllium? Round to correct sig figs.
a)
0.293 mol
b)
23.8 mol
c)
3.41 mol
d)
6.37 mol
61.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6? 
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L 
c)
1 mol = 6.02x 1023 particles 
d)
more than one
62.
Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO2?"
a)
1 mol = 22.4 L 
b)
1 mol = 44.01 g
c)
1 mol = 6.02x1023 atoms
d)
more than one
63.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
64.
The number 6.02 x 1023, which is the number of particles found in a mole. 
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
65.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
66.
Find the percent composition of hydrogen in (NH4)2S.
a)
11.8%
b)
41.1%
c)
47.1%
67.
How many moles are in 19.82 g Mg? 
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
 0.8156 mol Mg
68.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.050 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
69.
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?
a)
12.0 mol C
b)
12.0 mol Ca
c)
They are equal
70.
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
71.
How many grams are in 1.2 x 1024 molecules of CO?
a)
28 grams
b)
56 grams
c)
6.02 grams
d)
1.2 grams
72.

What is the molar mass of PbSO4?

a)

303.27 g/mol

b)

255.27 g/mol

c)

163.87 g/mol

d)

372.27 g/mol

73.

Which has the most particles?

a)

1 mole H2

b)

1 mole Na1+

c)

1 mole Al(OH)3

d)

These are all the same

74.

What is the correct equation to determine how many calcium ions (Ca2+) in 2 moles?

a)
b)
c)
d)

This cannot be determined as calcium is not bonded.

75.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
76.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
77.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
a)
SO
b)
SO2
c)
SO3
d)
SO4
78.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
79.
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
a)
 NaPO2
b)
Na2PO3
c)
Na3PO4
d)
NaPO4
80.
What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?
a)
C3H8
b)
CH4
c)
C2H2
d)
C4H10
81.
Whats the empirical formula of a molecule containing 18.7% of Lithium, 16.3% of Carbon and 65.0% of oxygen?
a)
CO2Li3
b)
Li2CO3
c)
Li3CO2
d)
LiCO5
82.
What is the percent by mass of oxygen in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
83.
What is the percent by mass of chlorine in NaCl?
a)
39%
b)
61%
c)
35%
d)
65%
84.
In which compound is the percent composition by mass of Cl equal to 42%?
a)
HClO (gram formula mass = 52 g/mol)
b)
HClO2 (gram formula mass = 68 g/mol)
c)
HClO3 (gram formula mass = 84 g/mol)
d)
HClO4 (gram formula mass = 100 g/mol)
85.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following BALANCED chemical equation to determine the ratio:
4NH3+6NO → 5N2+6H2O4NH_3+6NO\ \rightarrow\ 5N_2+6H_2O   
What is the ratio of  NH3NH_3   to  N2N_2  

a)

4:5

b)

1:1

c)

2:3

d)

5:6

86.

BALANCED chemical equations tell you the relative amounts or the ratios of reactants and products. 

Use the following UNBALANCED chemical equation to determine the ratio:
CO2 + LiOH → Li2CO3 + H2OCO_2\ +\ LiOH\ \rightarrow\ Li_2CO_3\ +\ H_2O   
What is the ratio of  H2OH_2O   to  CO2CO_2  

a)

1:1

b)

1:2

c)

2:2

d)

2:1

87.

Mole Ratios used for conversions are derived from:

a)

the molar mass of the reactants in the balanced chemical equation

b)

the coefficients of the balanced chemical equation

c)

the subscripts of the products in the balanced chemical equation

d)

the group number of each element in the balanced chemical equation

88.

What is the mole ratio of Ba(OH)2 to AlPO4?

AlPO4 + Ba(OH)2 → Al(OH)3 + Ba3(PO4)2

a)

3 mol Ba(OH)2 / 2 mol AlPO4

b)

1 mol Ba(OH)2/ 1 mol AlPO4

c)

2 mol Ba(OH)2/ 3 mol AlPO4

d)

1 mol Ba(OH)2/ 3 mol AlPO4

89.
Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
a)
2 mol AgNO3 / 2 mol Ag
b)
2 mol Ag / 2 mol AgNO3 
c)
2 mol AgNO3 / 2 mol Cu(NO3)2
d)
2 mol AgNO3 / 1 mol Cu(NO3)2
90.
4NH3 + 5O2-->4NO + 6H2O
What is the total number of moles of H2O produced when 12 mole of NH3 is completely consumed?
a)
15
b)
18
c)
20
d)
24
91.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

New problem: If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

a)

4 mol H2O

b)

6 mol H2O

c)

24 mol H2O

d)

96 mol H2O

92.

S8 + 12 O2 → 8 SO3


How many moles of S8 is needed to produce 12 moles of SO3?

a)

1

b)

1.5

c)

2

d)

12

93.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O


How many moles of CO2 is produced when 3 moles of H2O is also produced?

a)

2

b)

3

c)

4

d)

4.5

94.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O


How many moles of CO2 is produced when 17.5 moles of O2 reacts fully?

a)

4

b)

7

c)

10

d)

30.63

95.

Using the balanced chemical equation:

4NH3 + 3O2 --> 2N2 + 6H2O


Determine the amount of grams of N2 is produced if 4.03 moles of NH3 react?

a)

28.0 g N2

b)

56.4 g N2

c)

2.02 g N2

96.

Using the balanced chemical equation:

2C4H10 + 13O2 --> 10H2O + 8CO2


Calculate the number of grams of C4H10 needed to produce 5.12 moles of CO2.

a)

58.0 g C4H10

b)

2.56 g C4H10

c)

74.2 g C4H10

97.

How many grams are in 7.8 moles of NaCl?

a)

476grams

b)

460 grams

c)

452 grams

98.

How many moles are in 9.8 grams of calcium?

a)

0.2 moles

b)

4.1 moles

c)

1 mole

99.
A mass of 6 g of Carbon contains
a)
1 mole of C
b)
2 moles of C
c)
0.5 moles of C
d)
72 moles of C
100.
4.0 moles of H2O would have what mass?
a)
72 g
b)
23 g
c)
68 g
d)
4.5 g
101.
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
102.
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
103.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
125.2 g O2
104.

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)

0.875 grams

d)

1.875 moles

105.
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a)
0.85 g
b)
290 g
c)
450 g
d)
870 g
106.

The limiting reactant

a)

slows the reaction down

b)

is used up first

c)

is the reactant that is left over

d)

controls the speed of the reaction

107.

2 Al + 3 Cl2 ---> 2 AlCl3.

If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

a)

AlCl3

b)

Cl2

c)

Al

108.
When does a chemical reaction stop?
a)
When the lab is finished
b)
When the excess reactant is used up
c)
When the limiting reactant is used up
d)
Chemical reactions never stop
109.

4NH3+6NO --> 5N2 + 6H2O


What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?

a)

NH3

b)

NO

c)

N2

d)

water

110.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
111.
If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a)
theoretical yield
b)
mole ratio
c)
actual yield
d)
percentage yield
112.

SO2 + PCl5 --> SOCl2 + POCl3


How many molecules of of SOCl2 is produced when 16.2g SO2 react with 13.7g PCl5?

a)

3.98 X 1022 molecules

b)

1.52 X 1023 molecules

c)

4.19 X 10-25 molecules

d)

3.98 molecules

e)

1.52 molecules

113.
3. The reactant that is not completely used up in a chemical reaction is called the __________ .
a)
spectator reagent
b)
limiting reagent
c)
excess reagent
d)
catalyst
114.

6Na + Fe2O3 --> 3Na2O + 2Fe


If you are provided 200g of sodium and 250 grams of iron(III) oxide, how much of excess reagent is left?

a)

232 g

b)

18 g

c)

250 g

115.
P4 + 3O2 --> P4O6 
What is the limiting reactant is 12 moles of P4 react with 15 moles of O2?
a)
P4
b)
O2
c)
P4O6 
d)
none of the above
116.
How many grams of ammonia (NH3) can be produced from the reaction of 28 g of nitrogen gas and 25 grams of hydrogen gas? 
a)
43 g
b)
34 moles
c)
25 grams
d)
34 grams
117.

When reacting Na with Cl2, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

118.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
119.
CH4  +  2O2  →  CO2  +  2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.
a)
66 grams
b)
132 grams
c)
33 grams
d)
8.72

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