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Duplicate of The Mole, Empirical and Molecular Formula Flashcards | StudBud
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Duplicate of The Mole, Empirical and Molecular Formula
Duplicate of The Mole, Empirical and Molecular Formula
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#themole #empiricalformula #molecularformula
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Answers
1
How many moles do you have if you have 2.33x10
23
molecules KCl?
0.387moles of KCl
0.387 molecules of KCL
140e47moles
0.873 moles of KCl
2
What is the formula for calcium chlorate?
CaClO2
CaClO
CaClO3
Ca(ClO3)2
3
The MF is ______.
the actual formula
a made up formula
A bad we shouldn't use in chemistry
the lowest ratio of atoms
4
What is the empirical formula of C
8
H
18
O
2
?
C4H9
C8H18O
C2H4O
C4H9O
5
What is the empirical formula of C
6
H
12
O
6
?
C2H4O2
C6H12O6
CH2O
C3H4O3
6
What is the molar mass of calcium hydroxide?
100.46 g/mol
74.10 g/mol
58.10 g/mol
57.10 g/mol
7
What is the percent composition of Oxygen in water?
1.125%
112.5%
0.889%
88.9%
8
What is the sum of coefficients in a balanced equation Zn + HCl --> ?
5
4
2
3
9
What is the mass of calcium phosphate?
135.24 g/mol
310.24 g/mol
215.24 g/mol
262.24 g/mol
10
What is the mass of 0.500 moles of HF?
18.2 g/mol
10 g/mol
20.01 g/mol
18 g/mol
11
If the EF is CH
2
O and the molar mass is 180 g/mol. What is the Molecular Formula?
C6H12O6
C3H6O3
CH2O
C2H4O2
12
What kind of particle is Ca
2+
?
a molecule
a polyatomic ion
an atom
an ion
13
Which of the following units measure volume?
grams
meters
Liters
moles
14
The mole is also known as _____.
Avagadro's number
6.02e22
6.02x1024
6.02x1022
15
Which has more mass, a mole of carbon atoms or a mole of sodium atoms?
sodium
They are the same
carbon
16
What would take up more space, a mole of H
2
gas or a mole of CO
2
gas?
CO2
H2
they are the same
17
Which of the following is not considered a particle in chemistry?
ions
elements
molecules
moles
18
What is the EF of a compound with the following composition:40.00%C 6.72% H 53.28%O
CH2O
CHO
C2HO2
C2H4O2
19
What type of reaction is the reaction between Zn and HCl?
Decomposition
Synthesis
double displacement
Single displacement
20
The simplest ratio of numbers represented in a molecule is called_______.
Avagadro's Formula
Avacado's Formula
Molecular Formula
Empirical Formula
21
What is the molar mass of water?
all of these
18.02 g/mol
18.0 g/mol
18 g/mol
22
What is the percent composition of oxygen in aluminum oxide?
70.35%
47.08%
5.09%
32.03%
23
Which is more a mole of carbon atoms or a mole of sodium atoms?
same
Carbon
sodium
24
Which of the followin is expressed in g/mol?
a measured mass
chemical formula
Molar mass
formula unit
