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Moles Chemistry Quiz Review Flashcards | StudBud
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Moles Chemistry Quiz Review
Moles Chemistry Quiz Review
16 terms
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Moles, Mole conversions, Percent Composition
Flashcards
16 cards
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Practice quiz
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Questions
16
Answers
1
What is the molar mass of an oxygen molecule, O
2
?
31.998 g/mol
14.007 g/mol
22.990 g/mol
15.999 g/mol
2
What is the percent of sulfur in sodium sulfide, Na
2
S?
33.3 %
58.9 %
41.1 %
66.7 %
3
What number is used from the Periodic Table to calculate the molar mass of substances?
Period
Atomic number
Group
Atomic mass
4
How many grams are in 8.75 x 10
23
atoms of sulfur, S?
33.1 g
63.4 g
28.5 g
46.6 g
5
How much percent of lithium chloride, LiCl, is from lithium?
77.4 %
16.4 %
83.6 %
22.6 %
6
How many grams are in 0.5 mol of sodium chloride, NaCl (58.443 g/mol)?
116.886 g
88.5 g
29.222 g
20.5 g
7
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
8
What are particles called for elements?
molecules
radiation
formula units
atoms or ions
9
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
10
What is the molar mass of water, H
2
O?
33.006 g/mol
18.015 g/mol
17.007 g/mol
15.999 g/mol
11
How many mol of potassium atoms, K, are present in 2.32 x 10
23
atoms?
.75 mol
1.5 mol
.39 mol
3 mol
12
What is a mole in chemistry?
Amount of substance
Skin bump
Furry animal
None of the choices
13
How many molecules are in 18.015 g of water?
3.011 x 1023 molecules
6.022 x 1023 molecules
1.204 x 1024 molecules
9.033 x 1023 molecules
14
What is Avogadro's Number?
The amount of mass per mole of a substance
The number of particles per mole of a substance
The amount of area occupied per mole of a substance
The distance between energy levels for electrons
15
The value for Avogadro's Number is ____________.
1.008 g/mol
22.4 particles
1.5 moles
6.02 x 1023 particles
16
How many moles are in are in 2.016 g of hydrogen gas, H
2
?
0.5 mol
5 mol
2 mol
1 mol
