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Stoich Review Game

Total questions: 25

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

How is moles abbreviated?

a)

M

b)

m

c)

mol

d)

ml

2.

How do you find the molar mass for an element?

a)

Molar mass is the same as atomic mass, only in grams

b)

You convert into molar mass from a mass given to you

c)

You can only be given molar mass, it can't be calculated

d)

It is equal to Avogadro's Number

3.

What is the molar mass of Sucrose (C12H22O11)?

a)

182.00 g/mol

b)

45.00 g/mol

c)

342.34 g/mol

d)

377.85 g/mol

4.
What is the molar mass of C6H12O6?
a)

180.18 g/mol

b)

180.00 g/mol

c)

182.24 g/mol

d)

179.06 g/mol

5.

How many grams is one mole of Sodium?

a)

32.07 g

b)

118.71 g

c)

150.36 g

d)

22.99 g

6.

How many grams is 2 moles of Helium?

a)

4.00 g

b)

8.00 g

c)

2.02 g

d)

4.04 g

7.

How many moles are 156.00 grams of Chromium?

a)

4 mol

b)

52 mol

c)

3 mol

d)

1 mol

8.

How many moles would 91 grams of Magnesium be?

a)

8.4 mol

b)

21 mol

c)

2.5 mol

d)

3.7 mol

9.

How many grams are in 7.8 moles of NaCl?

a)

476.37 grams

b)

460.12 grams

c)

455.83 grams

d)

462.05 grams

10.

What is Avogadro's number?

a)

6.02 x 1023

b)

1 mole

c)

600 million

d)

6.02

11.

What is the conversion factor that should be used to determine how many molecules are there in 4.00 moles of glucose, C6H12O6?

a)
b)
c)
d)
12.

How many moles are in 6.02 x 1023 molecules of H2O?

a)

1 mole

b)

2 moles

c)

6.02 moles

d)

602000000000000000000000 moles

13.

How many moles are in 8.30 X 1023 molecules of H2O?

a)

1.38 X 1023 moles H2O

b)

1.38 moles H2O

c)

2 moles H2O

d)

1 mole H2O

14.

How many molecules are there in 31.8 moles of water?

a)

5.28 x 10-23 molecules

b)

1.91 x 1025 molecules

c)

5.28x 10-25 molecules

d)

1.91 x 1023 molecules

15.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
16.

In the reaction 2 H2 + O2 → 2 H2O what is the mole ratio of O2 to H2O

a)

1 mol O2 / 2 mol H2O

b)

2 mol O2/ 4 mol H2O

c)

3 mol O2/ 4 mol H2O

d)

4 mol O2/ 3 mol H2O

17.

In the equation 2 Al2O3 → 4 Al + 3 O2, what is the mole ratio of Al to O2?

a)

10 mol Al/ 6 mol O2

b)

3 mol Al/ 2 mol O2

c)

4 mol Al/ 3 mol O2

d)

2 mol Al / 3 mol O2

18.
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

19.
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)

291 g

c)

450 g

d)

870 g

20.
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)

223 g

c)

479 g

d)

814 g

21.
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
22.
Identify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl2.
 
1 Mg +  2 HCl --> 1 MgCl2  +  1 H2   
 
a)
Mg
b)
H2
c)
MgCl2
d)
HCl
23.
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

24.
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 FeS

b)

12.00 g FeS

c)

13.7 g FeS

d)

19.9 g FeS

25.

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 many grams excess reagent remains?

a)

11.77 g S

b)

.13 g S

c)

4.29 g S

d)

8.67 g S

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