stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Moles Test Review Flashcards | StudBud
Explore
/
Moles Test Review
Moles Test Review
30 terms
·
StudBud Administration
·
2,154 plays
Moles, Mole conversions, Empirical Formulas, Molecular Formulas, Percent Composition
Flashcards
30 cards
F
Practice quiz
P
Host live
L
Questions
30
Answers
1
What is the molar mass of an oxygen molecule?
14.007 g/mol
15.999 g/mol
22.990 g/mol
31.998 g/mol
2
What is the empirical formula for C
3
H
6
O
3
?
CH2O
CHO4
C3H6O3
CHO
3
How much percent of lithium chloride is from lithium, LiCl?
22.6 %
77.4 %
16.4 %
83.6 %
4
A sample has 5.5g of carbon and 14.5g of oxygen in a sample. What is the empricial formula?
NaCl
CO2
C2O4
CO
5
How many grams are in 0.5 mol of sodium chloride, NaCl?
29.222 g
20.5 g
116.886 g
88.5 g
6
A compound has an EmpF of NO
2
and a molecular mass of 92g/mol. What is the molecular formula?
NO2
N4O8
N3O6
N2O4
7
What number is used from the Periodic Table to calculate the molar mass of substances?
Atomic mass
Atomic number
Period
Group
8
The value for Avogadro's Number is ____________.
1.5 moles
22.4 particles
6.02 x 1023 particles
1.008 g/mol
9
What is molar mass?
Mass of 1 mole of a substance
The average mass of a furry animal
The mass of 100 moles of a substance
The mass of your wisdom teeth
10
A sample contains 67.3% potassium, K, and 32.7% fluorine, F. What is the empirical formula?
K3F
KF
KF3
K2F2
11
What is the molar mass of water?
15.999 g/mol
17.007 g/mol
18.015 g/mol
33.006 g/mol
12
What are particles called for elements?
molecules
formula units
atoms
radiation
13
How much space is occupied by 1 mole of any gaseous substance at STP?
22.4 L
44.8 L
6.022 x 1023 particles
11.2 L
14
Which substance can be recognized by the specific particle called an atom?
Lithium, Li
Calcium fluoride, CaF2
Methane, CH4
Fluorine, F2
15
This is the image of an aspirin molecule. How many Oxygen atoms are there in 15 molecules?
4 atoms
60 atoms
135 atoms
120 atoms
16
Which of the following is used for particles of a nonmetals bonding to nonmetals?
atoms
molecules
formula units
gamma
17
How many mol of potassium atoms, K, are present in 2.32 x 10
23
atoms?
.75 mol
3 mol
1.5 mol
.39 mol
18
How many molecules are in 18.015 g of water?
3.011 x 1023 molecules
1.204 x 1024 molecules
6.02 x 1023 molecules
9.033 x 1023 molecules
19
How many mol of carbon dioxide are present in 35.8 L at STP?
0.67 mol
1.6 mol
3.3 mol
.45 mol
20
What is the percent of sulfur in sodium sulfide, Na
2
S?
41.1 %
33.3 %
66.7 %
58.9 %
21
Which value is equal to 1 mol of any substance
22.4 x 1023 molecules
11.2 L
12.011 g
6.02 x 1023 particles
22
How many grams are in 8.75 x 10
23
atoms of sulfur, S?
46.6 g
33.1 g
63.4 g
28.5 g
23
What is Avogadro's Number?
The amount of area occupied per mole of a substance
The number of particles per mole of a substance
The amount of mass per mole of a substance
The distance between energy levels for electrons
24
A substance has a molecular mass of 42g/mol. If it is made of 85.7% C and 14.3% H, what would the molecular fomula be?
C2H4
CH2
C4H8
C3H6
25
How many moles are in are in 2.016 g of hydrogen gas?
0.5 mol
5 mol
1 mol
2 mol
26
What is a mole in chemistry?
Furry animal
None of the choices
Amount of substance
Skin bump
27
How many liters are in 25 g of carbon monoxide, CO?
26 L
35 L
20 L
12 L
28
If iron (III) oxide has a molecular formula of Fe
2
O
3
, what is the empirical formula?
Fe4O6
FeO3
FeO
Fe2O3
29
How many formula units are in 2 mol of calcium oxide, CaO?
9.03 x 1023 formula units
1.204 x 1024 formula units
3.011 x 1023 formula units
22.4 L
30
How many liters are occupied by 0.45 mol of carbon tetrahydride gas, CH
4
,at STP?
51 L
21 L
10 L
33 L
