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Reactions, Mole Ratio, and Mole Conversions Version B

Total questions: 48

Worksheet time: 3hrs 44mins

Name
Class
Date
1.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
2.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
3.
type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
4.
type of reaction in which two or more elements combine to form a more complex compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
5.
_AgNO3 + _Cu →_Cu(NO3)2 + _Ag
a)
2 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 1 Ag
b)
2 AgNO3 + 1 Cu → 1 Cu(NO3)2 + 2 Ag
c)
1 AgNO3 + 2 Cu → 2 Cu(NO3)2 + 1 Ag
d)
3 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 2 Ag
6.
_AlBr3 + _K2SO4 → _KBr + _Al2(SO4)3
a)
6 AlBr3 + 1 K2SO4 → 6 KBr + 1 Al2(SO4)3
b)
2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3
c)
1 AlBr3 + 1 K2SO4 → 2 KBr + 3 Al2(SO4)3
d)
2 AlBr3 + 3 K2SO4 → 1 KBr + 2 Al2(SO4)3
7.
_Al + _HCl →_H2 + _AlCl3
a)
2 Al + 2 HCl → 2 H2 + 6 AlCl3
b)
3 Al + 3 HCl → 6 H2 + 2 AlCl3
c)
1 Al + 1 HCl → 3 H2 + 1 AlCl3
d)
2 Al + 6 HCl → 3 H2 + 2 AlCl3
8.
What can be determined from a balanced chemical equation?
a)
Mole ratio of any two substances in the reaction
b)
Energy released in the reaction.
c)
Electron configuration of all elements in the reaction. 
d)
Mechanism involved in the reaction. 
9.
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
10.
6CO2 + 6H2O --> C6H12O6 + 6O2 
What is the total number of moles of water needed to make 2.5 moles of C6H12O6?
a)
2.5
b)
6
c)
12
d)
15
11.
6CO2 + 6H2O --> C6H12O6 + 6O2 
What is the total number of moles of CO2 needed to make 2 moles of C6H12O6?
a)
2.5
b)
6
c)
12
d)
15
12.

Which of the following statements regarding the mole is INCORRECT?

a)

A mole is a unit of quantity equal to 6.02 x 1023 particles.

b)

The number of particles in a mole is known as Avogadro’s number.

c)

A mole of particles of an element is numerically equal to the atomic mass of the element.

d)

none of the above

13.

The mass of one mole of an element is equal to

a)

its atomic number from the periodic table, but in amus.

b)

its atomic mass from the periodic table, but in amus.

c)

its atomic mass from the periodic table, but in grams.

d)

its atomic number from the periodic table, but in grams.

14.

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

15.

How many formula units are in 2.5 moles of NaCl?

a)

1.5 x1024 formula units

b)

1.5 formula units

c)

4.2 formula units

d)

4.2 x10-24 molecules

16.
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
d)
1.91 x 1022
17.

Determine the mass of 4.20 moles of C6H12

a)

353 g

b)

0.0499 g

c)

337 g

d)

2.53 x 1024 g

18.
Which conversion factor should be used to solve the following, "How many moles are 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
19.
What is the volume occupied by 1 mole of any gas?
a)
44.8 L
b)
22.4 L
c)
16.8 L 
d)
20.4 L 
20.

How many moles are in a 18 L tank of nitrogen gas?

a)

0.9 moles

b)

1 mole

c)

0.8 moles

d)

0.75 moles

21.

How many moles are in 89 liters of water vapor?

a)

1993.6 moles

b)

4.93 moles

c)

1.478 moles

d)

3.97 moles

22.
How many moles are 2.85 x 1020 atoms of iron?
a)
4.73 x 10-4 moles
b)
1.72 x 104 moles
c)
1.72 x 10-42 moles
d)
4.73 x 104 moles
23.
How do we get mass from moles?
a)
multiply by avogadro's number
b)
multiply by molar mass
c)
divide by avogadro's number
d)
divide by molar mass
24.
Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?
a)
A
b)
B
c)
C
d)
D
25.
Which conversion factor should be used to solve the following, "Find the mass in grams of 2.00 x 1023 molecules of F2."
a)
1 mol = 22.4 L 
b)
1 mol = 38.00 g
c)
1 mol = 6.02x1023 atoms
d)
more than one
26.
Which of the following would have the highest mass?
a)
0.75 mol Co3(PO4)2
b)
12 mol CH4
c)
16.2 mol chlorine gas
d)
1.2 mol IrI3
27.
How many grams of carbon are in 0.63 moles of carbon?
a)
3.79x1023 g C
b)
.0524 g C
c)
7.57 g C
d)
.800 g C
28.
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
a)
setup B : 0.6644mol Co
b)
setup A: 2.41x1047mol Co
c)
setup A : 0.664mol Co
d)
setup B: 2.41x1047mol Co
29.
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
30.
Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"
a)
1 mol = 22.4 L 
b)
1 mol = 39.95 g
c)
1 mol = 6.02x1023 atoms
d)
More than 1
31.
How many moles are in 22 g of argon? 
a)
880 moles
b)
0.55 moles
c)
1.81 moles
d)
5 moles
32.

If you are going from grams of CaCl2 to particles of CaCl2, what is the number of steps you need to take?

(a)  

33.

Check all that apply: These are the steps needed to go from L of N2 to L of NH3 in the following reaction:

N2 + 3H2 --> 2NH3

a)

Go from grams N2 to moles N2

b)

Go from L N2 to moles N2

c)

Go from moles N2 to L NH3

d)

Go from moles N2 to moles NH3

e)

Go from moles NH3 to L NH3

34.

To convert from substance A to substance B, you must always go through ___________ ___________

(a)  

35.

How many molecules of water are in a 821.3 g sample?

a)

45.58 molecules

b)

8.232 x 1025 molecules

c)

8.909 x 1027 molecules

d)

2.744 x 1025 molecules

36.

What is the mass of 4.98 x 1024 atoms of Zn?

a)

541 g

b)

8.27 g

c)

.122 g

d)

4.59 x 1046 g

37.

N2 + 3H2 → 2NH3

How many grams of NH3 is produced when 28.0 g of N2 is completely consumed?

a)

28.0 g

b)

32.0 g

c)

34.0 g

d)

36.0 g

e)

38.0 g

38.
Calculate the mass of iron in a sample of iron ore containing 2.61x1023 iron atoms.
a)
0.433g
b)
24.2g
c)
44g
d)
6.02g
39.
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
40.
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
41.
What is the limiting reactant if 10 moles of NH3  react  with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
a)
NH3
b)
NO
c)
N2
d)
water
42.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
43.
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
44.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Yield
45.
In this image, what are the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Yield
46.
What is the arrow in a chemical equation...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
47.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
48.
Why is the following chemical equation not balanced?
H2 + O2 --> H2O
a)
each side of the equation has a different number of oxygen atoms
b)
each side of the equation has a different number of hydrogen atoms
c)
each side has the same mass
d)
there are no coefficients

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