wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Stoichiometry Review

Total questions: 40

Worksheet time: 2hrs 5mins

Name
Class
Date
1.
 The equation for Percent Yield:
a)
(predicted/experimental) X 100
b)
(experimental/predicted) X 100
c)
(experimental - predicted)/ Predicted X 100
2.
True or False. You must convert grams to moles to do stoichiometry.
a)
True
b)
False
3.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
4.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)
2
b)
4
c)
6
d)
8
5.
What is a Limiting Reagent?
a)
speeds up a reaction
b)
what you run out of first
c)
what you have left over
d)
slows down a reaction
6.
What is a Excess Reagent?
a)
amount you end with
b)
what you run out of first
c)
what you have left over
d)
what you start with
7.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg 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
8.
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
9.
Use the equation 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
d)
Gary Busey
10.
If you predicted that 1.5 moles of Magnessium are used in a reaction, and you have 2.0 moles of Magnessium, what type of reactant is Magnessium?
a)
Limiting Reactant
b)
Excess Reactant
c)
Fast Reacter
d)
Non-Reactant
11.
What is the measured amount of a product obtained from a chemical reaction?
a)
mole ratio
b)
theoretical yield
c)
percentage yield
d)
actual yield
12.
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
13.
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%
14.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron (Fe) can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
15.
When 12 moles of O2 reacts with 1.1 mole of C10H8 what is the limiting reactant?  C10H8 + 12 O2 --> 10 CO2 + 4 H2O
a)
Oxygen
b)
C10H8
c)
Water
d)
Carbon Dioxide
16.

1Mg + 2H2O --> Mg(OH)2 + H2

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?

a)

62.0 L

b)

0.12 L

c)

2.77 L

d)

1.15 L

17.
How many particles are in a mole?
a)
602
b)
602 million
c)
602 moles
d)
6.02 x 1023
18.
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
19.
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
20.
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
21.
Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl2.
 
Mg +  2HCl --> MgCl2  +  H2   
 
a)
Mg
b)
H2
c)
MgCl2
d)
HCl
22.
How many grams are in 7.8 moles of NaCl?
a)
476grams
b)
460 grams
c)
452 grams
d)
462 grams
23.
Fe (s) + S (l) --> FeS (s)  

In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?
a)
14.8 g
b)
12.2 g
c)
13.7 g
d)
19.9 g
24.

How many particles are in 13.5 grams of Beryllium?

a)

1.50 particles

b)

9.03 particles

c)

4.00x1023 particles

d)

9.03x1023 particles

25.
What is the molar mass of Fe3(PO4)2
a)
823.8g/mol
b)
357.5 g/mol
c)
455.6g/mol
d)
86.3g/mol
26.
A formula with the lowest whole # ratio of elements in a compound is called
a)
Molecular Formula
b)
Chemical Formula
c)
Empirical Formula 
d)
Distance Formula
27.

Identify the Empirical Formula for:

C4H6

a)

CH

b)

CH3

c)

C2H3

d)

C4H6

28.

Identify the Empirical Formula for:

Br2O6

a)

BrO3

b)

Br6O2

c)

BrO

d)

Br2O6

29.

Identify the Empirical Formula for:

C2H4

a)

CH

b)

CH2

c)

C4H2

d)

C2H4

30.

What is the number of moles of beryllium in 36 g of Be?

a)

0.25 mol

b)

4.0 mol

c)

45 mol

d)

320 mol

31.

Which of the following setups correctly shows the conversion of 160g of Al(NO3)3 to moles?

(molar mass = 213 g/mole)

a)
b)
c)
d)
32.

To work stoichiometry problems, we must start with a

_______________ .

a)

reactant

b)

2 reactants

c)

chemical equation

d)

balanced chemical equation

33.

To form mole ratios comparing reactants and products in a balanced chemical equations, chemist use

a)

The coefficients in an unbalanced chemical equation

b)

the coefficients in a balanced chemical equation

c)

the subscripts indicating how many of each type of atom are present

d)

the molar masses of the chemicals

34.

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

35.

Using N2 + 3H2 → 2NH3

How many moles of NH3 will be produced when you react 3.6 mol H2?

The dimensional analysis used to solve the problem above will look like…

a)
b)
c)
d)
36.

Using 2 Cr2O3 → 4 Cr + 3 O2

How many grams of Cr are produced when 576 grams of Cr2O3 are reacted?

The dimensional analysis used to solve the problem above will look like…

a)
b)
c)
d)
37.
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
38.
For the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?
a)
749 g
b)
225 g
c)
479 g
d)
814 g
39.
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)
124 g O2
40.

Use the following reaction:

Mg + 2 HCl → MgCl2 + H2


If 123.2 g of magnesium chloride are produced from 60.0 g HCl, what is the percent yield of the reaction?

a)

dd

b)

dd

Similar Resources on Wayground

Amin

40 questions

Amin

quiz

Worksheet

•

12th Grade

SOAL KESETIMBANGAN

45 questions

SOAL KESETIMBANGAN

quiz

Worksheet

•

11th Grade

ôn tập nguyên tử

45 questions

ôn tập nguyên tử

quiz

Worksheet

•

10th Grade

Long Quiz

40 questions

Long Quiz

quiz

Worksheet

•

9th - 10th Grade

EXAMEN 2DO PARCIAL QUÍMICA C8

41 questions

EXAMEN 2DO PARCIAL QUÍMICA C8

quiz

Worksheet

•

9th Grade

HÓA 12-HK1-HỮU CƠ

40 questions

HÓA 12-HK1-HỮU CƠ

quiz

Worksheet

•

12th Grade

Chemistry revision - Water

40 questions

Chemistry revision - Water

quiz

Worksheet

•

7th - 10th Grade

Year 8 Revision Quiz

40 questions

Year 8 Revision Quiz

quiz

Worksheet

•

8th - 9th Grade