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SCH3U 03 The Mole Flashcards | StudBud
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SCH3U 03 The Mole
SCH3U 03 The Mole
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#sch3u #mole #chemistry
Flashcards
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Questions
16
Answers
1
What is the
molar mass
for sodium phosphate?
100 g/mol
164 g/mol
54 g/mol
118 g/mol
2
How many molecules of water is 3.5 mol H
2
O?
5.8 x10-24
1.7 x1023
6.3 x1024
2.1 x1024
3
What is the
empirical formula
of a compound with percent composition: 62.6% Sn, 37.4% Cl
SnCl4
SnCl
SnCl3
SnCl2
4
In chemistry, the symbol
M
stands for the quantity:
1000
molar mass
mass
amount
5
What is the
mass
of 2.70 mol of CBr
4
?
91.9 g
123 g
248 g
895 g
6
When 10.0 g of CO
2
and 10.0 g of NaOH react, H
2
O and ______ g of Na
2
CO
3
are produced.
20.0
10.0
10.6
17.2
7
“A specific compound always contains the same elements in the same ratio by________.”
volume
mass
molecules
8
In a
mass spectrometer
particles are sorted by mass per charge using __________ .
gravitational fields
rugby fields
magnetic fields
electric fields
9
The
molecular formula
for a sulfur-chlorine compound which is 23.2% S and has M = 277.2 g/mol.
SCl2
SCl3
S2Cl6
S2Cl4
10
Absorption modules in a combustion analyzer collect . . .
elements
excess reactants
dust
oxides of elements
11
The symbol for
Avogadro's number
is:
AN
Av
NA
K
12
How many sulfide ions are in 0.38 mol of Fe
2
S
3
?
6.9 x1023
4.6 x1023
2.3 x1023
6.9 x1024
13
What is the sulfur
percent composition
of SO
2
?
33%
1%
50.%
25%
14
Which of the following is an
empirical formula
?
N2O5
C6H10Cl4
S5H10
C40H82
15
What
mass
of C is required to react with Fe
2
O
3
to make CO
2
and 50.0 g of Fe?
10.7 g
17.5 g
8.06 g
14.3
16
What are the units for
molar mass
?
mol
g/mol
mol/g
g
