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Chemistry Exam Review Flashcards | StudBud
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Chemistry Exam Review
Chemistry Exam Review
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chemistry
Flashcards
32 cards
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Questions
32
Answers
1
How many atoms of oxygen are there in iron (III) nitrate Fe(NO
3
)
3
?
12
9
6
3
2
The compound SiF
4
has how many total valence electrons?
28
11
32
8
3
Which of the following represents the trend in atomic radius as you move through a group?
decreases going right
increases going right
increases going down
decreases going down
4
How does an oxygen atom become an oxygen ion with a 2- charge?
gains 2 protons
loses 2 protons
gains 2 electrons
loses 2 electrons
5
How many atoms are involved in the following reaction? 2Na + Cl
2
--> 2 NaCl
6
3
2
4
6
Which of the following substances is likely to dissolve in water to form a conducting solution?
CO2
MgCl2
NH3
All of these
7
Which of the following represents a molecule?
CO2
NaCl
MgCl2
LiF
8
Numbers placed in front of formulas in chemical equations are known as
coefficients
subscripts
formula units
superscripts
9
Which of the following statements is true about an endothermic reaction?
Not enough information
The products have more energy than the reactants
The products and reactants have similar energies
The reactants have more energy than the products
10
A large difference in electronegativities (>1.67) will result in a(n) _________ bond.
nonpolar covalent
polar covalent
ionic
not enough information
11
Which of the following is true about pH?
As pH increases, [H+] increases
As pOH increases, [OH-] increases
As pH changes by 1, [H+] changes by a factor of 10
The pH of acidic solutions is > 7
12
How should the compound Fe
2
O
3
be named?
Diiron Trioxide
Iron oxide
Iron (III) oxide
Iron (II) oxide
13
Which of the following represents the trend in electronegativity as you move through a period?
increases going right
decreases going right
decreases going down
increases going down
14
Which of the following is NOT true about one mole?
12g of carbon contains one mole of atoms
the # of atoms in 1 mol of C = the # of atoms in 1 mol B
the mass of 1 mol C = the mass of 1 mol B
one mole contains 6.02x1023 molecules
15
What is the mass of one mole of CH
4
?
52g
20.15g
17g
16.04g
16
H
2
S would have what molecular geometry?
tetrahedral
trigonal planar
linear
angular
17
Which atomic particles are equal in mass?
proton, neutron
proton, neutron, and electron
neutron, electron
proton, electron
18
Balance the following equation: ___P + ___O
2
--> ___P
4
O
10
5, 4, 1
1, 4, 5
1, 2, 1
4, 5, 1
19
Consider the equation 2H
2
+ O
2
--> 2H
2
O. Which is the limiting reactant in the chamber below?
hydrogen
not enough information
water
oxygen
20
What type of reaction is this? N
2
+ 3H
2
-> 2NH
3
double replacement
synthesis
single replacement
decomposition
21
The simplest whole-number ratio of the atoms in a substance is called the
empirical formula
ideal formula
molecular formula
structural formula
22
Element Y forms the ion Y
3+
; element Z forms the ion Z
2-
. Chemical formula when they combine?
YZ
Y2Z
Y3Z2
Y2Z3
23
Which of the following is NOT always conserved in a chemical reaction?
grams
moles
molecules
atoms
24
What is the correct name for Na
2
SO
4
?
disodium sulfur tetroxide
disodium sulfate
sodium sulfate
sodium tetrasulfate
25
What is the percent composition of NO
2
?
43.8% O, 56.2% N
69.6% N, 30.4% O
43.8% N, 56.2% O
69.6% O, 30.4% N
26
1s
2
2s
2
2p
6
3s
2
3p
5
is the electron configuration for which element?
Br
Cl
Mn
F
27
What is the formula for silver phosphate?
Ag3P
AgPO4
Ag3PO4
Si3PO4
28
In the reaction 2Al + 3Cl
2
--> 2AlCl
3
, what is the mole ratio of
chlorine
to
aluminum chloride
?
2:2
3:2
6:2
2:3
29
Determine the mass of 3.50 moles of copper.
223 g Cu
0.0551 g Cu
0.055 g Cu
222 g Cu
30
What mass of potassium metal contains the samenumber of atoms as 24.3 g of magnesium?
39.1g
none of these
48.6g
24.3g
31
Ne, a noble gas, has a stable e
-
arrangement. Which has the same e
-
configuration as Ne?
Li+
Mg+
F-
Cl-
32
A positively charged piece of tape is held near atoms of metal foil. What will happen?
electrons move toward the tape, but stay with the same atom
electrons move away, but stay with the same atom
electrons will move away from the tape
electrons move toward the tape
