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U6 The Mole MC Review

Total questions: 67

Worksheet time: 4hrs 14mins

Name
Class
Date
1.

What is the empirical of this molecule?

a)

C6H12O6

b)

C2H6O2

c)

CH2O

d)

C6H11O4

2.

What is the molecular formula for this molecule?

a)

C6H12O6

b)

C2H6O2

c)

CH2O

d)

C6H11O4

3.

Which molecules have the same empirical formula?

a)

A +B +C

b)

B + C

c)

C + D

d)

D + A

e)

A +B +C + D

4.

Which Molecule has a molecular formula of C4H8

a)

A

b)

B

c)

C

d)

D

5.

Which compounds have the same molecular formula?

a)

A + B

b)

C + D

c)

A+D

d)

B+ C

6.

How many moles is 78 grams of Li3N?

a)

34.827 moles

b)

2.24 moles

c)

78 moles

d)

20.82 moles

7.
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
8.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
9.
How many moles are in 9.8 grams of calcium? 
a)
0.20 moles
b)
4.1 moles
c)
1.0 mole
d)
392 moles
10.
Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?
a)
A
b)
B
c)
C
d)
D
11.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
12.
What is Avogadro's Number? 
a)
6.02 x 1023
b)
- 6.02 1023
c)
6.02 x 1022
d)
6,020,000,000,000
13.
How many molecules of sugar (C6H12O6) are in ONE mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
14.
Number of N atoms in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
15.
How many grams is 1.2 moles of Neon?
a)
0.05 grams
b)
16.6 grams
c)
21.2 grams
d)
24 grams
16.
Find the number of moles in 25 grams of HF?
a)
1.2 mol HF
b)
25 mol HF
c)
0.8 mol HF
d)
80. mol HF
17.
What is the molar mass of NaOH?
a)
368.0 g/mole 
b)
40.00 g/mole
c)
57.00 g/mole
d)
23.00 g/mole
18.
What are the arrows pointing to?
a)
coefficient
b)
subscripts
c)
pineapple
d)
a number
19.
BONUS! How many molecules are in 9.4 moles of AlCl3?
a)
5.66
b)
5.66x1024
c)
0.705
d)
1.25x1023
20.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
21.
What is Avogadro's Number? 
a)
6.02 x 1023
b)
- 6.02 1023
c)
6.02 x 1022
d)
6,020,000,000,000
22.
The molar mass of an element is the mass of one ____ of the element.
a)
atom
b)
molecule
c)
mole
d)
gram
23.
A mole of Neon contains
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
24.

How many moles of carbon are there in a pure diamond with mass 6g?

a)

0.5mol

b)

1.0mol

c)

2.0mol

d)

4.0mol

25.
What is the molar mass of NaCl?
a)
58.45g/mol
b)
28g/mol
c)
12g/mol
d)
6.02 x 1023
26.
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
27.
How many moles are there in 12.7g of CaF2?
a)
0.20 mol
b)
1,000.76 mol
c)
6.14 mol
d)
0.16 mol
28.

Shivani measures out 6.0 moles of epsom salt (MgSO4) to put in her bath. How many grams of MgSO4 went in the bath?

a)

3.6 x 1024 g

b)

720 g

c)

0.050 g

d)

340 g

29.
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
30.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48.10 g/mol
b)
34.02 g/mol
c)
36.54 g/mol
d)
35.51 g/mol
31.
How many moles are in 16.94 g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
32.
How many moles of magnesium are in 3.01x1022 atoms of magnesium?
a)
5.00x1044 moles Mg
b)
0.050 moles Mg
c)
1.81x1046 moles Mg
d)
5 moles Mg
33.
You have 8.65 x 1025 atoms of arsenic. How many grams do you have?
a)
144 g As
b)
10,765 g As
c)
107 g As
d)
None of these
34.
How many molecules are in 3.6 grams of NaCl?
a)
0.06
b)
1.0x1021
c)
1.3x1026
d)
3.7x1022
35.
Calculate the number of atoms in 4.00 x 10-5 g of sodium.
a)
1.05 x 1018 atoms
b)
3.92 x 1019 atoms
c)
3.24 x 1023 atoms
d)
5.54 x 1020 atoms
36.
What is the mass of 1.0 x 1012 molecules of O2?
a)
1.9 x 1013 g
b)
6.0 x 1011 g
c)
5.3 x 10-11 g
d)
1.7 x 10-12 g
37.
Which one is an empirical formula?
a)
H2O2
b)
C2H6O12
c)
CaCl2
d)
N2O8
38.

C4H6

a)

CH

b)

CH3

c)

C2H3

d)

C4H6

39.
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
40.
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
41.
Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?
a)
C2H3O2
b)
CH2O
c)
C2H4O2
d)
C3H8O3
42.
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
43.
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
44.
What is the best statement for the picture. 
a)
The molecule has two carbon atoms and four hydrogen molecules. 
b)
The molecule has two carbon atoms and four hydrogen atoms. 
c)
The molecule has two carbon atoms. 
45.
What is the best formula for this molecule?
a)
2H2O2
b)
6H2O2
c)
6H12O12
d)
6HO
46.
What is the best formula for this molecule?
a)
C3H4O3
b)
C3H4O
c)
C3H4O2
d)
C3H4O4
47.
What is the best formula for this molecule?
a)
C5HO4
b)
C5HO7
c)
C5HO8
48.
What is the best formula for these molecules?
a)
H2O
b)
H2O2
c)
3H2O
d)
4H2O
49.
What is the total number of atoms in this molecule?
a)
11
b)
3
c)
8
d)
10
50.
How many grams are in 7.5 X 1023 molecules of H2SO4
a)
98.09 g H2SO4
b)
122g H2SO4
c)
45g H2SO4
d)
100g H2SO4
51.

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)
52.

What converting from moles to the number of particles, moles is multiplied by:

a)

an equivalent value

b)

a conversion factor

c)

the number of atoms in the formula

d)

the mass of the substance

53.

Why is the mole used in chemistry?

a)

The mass of atoms is in AMUs which is too hard to convert to grams.

b)

A dozen is not a scientific amount.

c)

Chemists needed to make chemistry easier to understand.

d)

It makes counting large numbers of small particles easier.

54.

SELECT ALL CORRECT ANSWERS - The mole can be used to measure:

a)

The amount of atoms in an element

b)

The amount of molecules in a covalent substance

c)

The amount of formula units in an ionic compound

d)

The amount of mass an object has

55.

What are the units for Avogadro's number?

a)

meters

b)

particles

c)

grams

d)

liters

56.

How many grams are in

1.2 x 1024 atoms of C?

a)

23.94 grams C

b)

0.1659 grams C

c)

6.02 grams C

d)

2.394 X 1047 grams C

57.
How many atoms are in a 3.56 g sample of Cu?
a)
3.37 x 1022 Cu atoms
b)
6.02 x 1023 Cu atoms
c)
0.056 Cu atoms
d)
1 Cu atom
58.
Given 500.0 Liters of H2 gas, convert to molecules.
a)
6.74 x 1027 molecules H2
b)
1.86 x 10-20 molecules H2
c)
1.34 x 1025 molecules H2
d)
3.71 x 10-23 molecules H2
59.

What is the mass of oxygen gas in a 250 L tank?

a)

179200 g O2

b)

0.697 g O

c)

357.14 g O2

d)

178.57 g O

60.

What is the volume of 135 grams of NH3?

a)

51528 L NH3

b)

0.3537 L NH3

c)

201.33 L NH3

d)

177.46 L NH3

61.

What is the volume of 4.5 X 1025 molecules of krypton?

a)

1674.42 L Kr

b)

3.337 L Kr

c)

1.67 X 1049 L Kr

d)

1.209 X 1048 L Kr

62.

How many atoms of neon are found in 4.5 liters of neon?

a)

1.6744 X 10-22 atoms Ne

b)

1.67 X 1024 atoms Ne

c)

1.209 X 1023 atoms Ne

d)

6.068 X 1025 atoms Ne

63.

What is the mass of 78.5 liters of CO2 at STP?

a)

77387.184 g CO2

b)

154.23 g CO2

c)

3454.23 g CO2

d)

98.16 g CO2

64.
Given 3.99 x 1022 molecules of Cl2 gas, convert to Liters.
a)
5.38 x 1047 Liters Cl2
b)
2.96 Liters Cl2
c)
1.07 x 1045 Liters Cl2
d)
1.48 Liters Cl2
65.
Given 500.0 Liters of H2 gas, convert to molecules.
a)
6.74 x 1027 molecules H2
b)
1.86 x 10-20 molecules H2
c)
1.34 x 1025 molecules H2
d)
3.71 x 10-23 molecules H2
66.
Given 10.00 grams of Al2(SO4)3, convert to molecules of Al2(SO4)3.
a)
2.06 x 1027 molecules
b)
1.76 x 1022 molecules
c)
4.85 x 10-26 molecules
d)
5.68 x 10-21 molecules
67.
How many atoms are in a 3.56 g sample of Cu?
a)
3.37 x 1022 Cu atoms
b)
6.02 x 1023 Cu atoms
c)
0.056 Cu atoms
d)
1 Cu atom

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