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Duplicate of Moles Test Review Flashcards | StudBud
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Duplicate of Moles Test Review
Duplicate of Moles Test Review
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Moles, Mole conversions, Empirical Formulas, Molecular Formulas, Percent Composition
Flashcards
19 cards
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Practice quiz
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Questions
19
Answers
1
How many mol of potassium atoms, K, are present in 2.32 x 10
23
atoms?
.75 mol
3 mol
.39 mol
1.5 mol
2
How many liters are in 25 g of carbon monoxide, CO?
26 L
12 L
35 L
20 L
3
How many moles are in are in 2.016 g of hydrogen gas, H
2
?
2 mol
5 mol
0.5 mol
1 mol
4
How many grams are in 0.5 mol of sodium chloride, NaCl (58.443 g/mol)?
88.5 g
20.5 g
116.886 g
29.222 g
5
What is the molar mass of water, H
2
O?
17.007 g/mol
15.999 g/mol
33.006 g/mol
18.015 g/mol
6
The value for Avogadro's Number is ____________.
1.008 g/mol
22.4 particles
6.02 x 1023 particles
1.5 moles
7
What is a mole in chemistry?
Amount of substance
Furry animal
None of the choices
Skin bump
8
What number is used from the Periodic Table to calculate the molar mass of substances?
Atomic mass
Period
Atomic number
Group
9
What is Avogadro's Number?
The number of particles per mole of a substance
The amount of area occupied per mole of a substance
The amount of mass per mole of a substance
The distance between energy levels for electrons
10
How many liters are occupied by 0.45 mol of methane gas at STP?
33 L
51 L
10 L
21 L
11
How many mol of carbon dioxide are present in 35.8 L at STP?
0.67 mol
3.3 mol
.45 mol
1.6 mol
12
What is molar mass?
The average mass of a furry animal
The mass of your wisdom teeth
Mass of 1 mole of a substance
The mass of 100 moles of a substance
13
How much percent of lithium chloride, LiCl, is from lithium?
77.4 %
83.6 %
22.6 %
16.4 %
14
What is the percent of sulfur in sodium sulfide, Na
2
S?
58.9 %
33.3 %
41.1 %
66.7 %
15
How many molecules are in 18.015 g of water?
6.022 x 1023 molecules
3.011 x 1023 molecules
9.033 x 1023 molecules
1.204 x 1024 molecules
16
How many grams are in 8.75 x 10
23
atoms of sulfur, S?
63.4 g
46.6 g
28.5 g
33.1 g
17
How much space is occupied by 1 mole of any gaseous substance at STP?
44.8 L
11.2 L
22.4 L
6.022 x 1023 particles
18
How many formula units are in 2 mol of calcium oxide, CaO?
3.011 x 1023 formula units
22.4 L
9.03 x 1023 formula units
1.204 x 1024 formula units
19
What are particles called for elements?
formula units
molecules
radiation
atoms or ions
