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Chemistry - Semester 1 Review Flashcards | StudBud
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Chemistry - Semester 1 Review
Chemistry - Semester 1 Review
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Answers
1
How many molecules are in 2.0 moles of C
2
H
2
?
6.022 x 1023 molecules
26 grams
1.2044 x 1024 molecules
52 grams
2
What is 2.02 moles + 8.0 moles with the correct number of significant figures?
10 moles
10.02 moles
10.0 moles
10. moles
3
What is the temperature at which the substance condenses?
-115 oC
25 oC
Above 25 oC
Below -115 oC
4
Which element has an electron configuration of [Ne] 3s² 3p⁵?
Cl
Ar
Ne
F
5
The process described in the image is ________.
Melting
Beta Decay
Alpha Decay
Bounce Ball Subtraction
6
Which functional group is not pressent in cysteine?
Sulfhydryl
Amino
Carboxylic Acid
Methyl
7
165 mL is equal to _______ L
165,000 L
0.165 L
0.000165 L
165 L
8
How many significant figures are in 0.004602 mg?
6
7
4
3
9
What is the molecular geometry of Nitrate and hybridization of N in Nitrate?
Trigonal planar- sp3
Trigonal pyramidal - sp2
Trigonal planar- sp2
Trigonal pyramidal - sp3
10
What is the appropriate name of HBr
Hydrobromic acid
Bromic acid
Hydrogen bromide
Hydrogen monobromide
11
The P
total
of a mixture is 5.0 atm. H
2
exerts 2.5 atm, N
2
exerts 1.5 atm. What is the partial pressure of He?
5.0 atm
4.0 atm
9.0 atm
1.0 atm
12
Which of the following is an acceptible measurement reading of the water in the beaker?
200 mL
185 mL
180 mL
185.2 mL
13
At constant temperature, if you double the volume of a gas what will happen to its pressure?
It will go down x4
It will go up x2
It will go up x4
It will go down x2
14
Which of the following is an extensive property?
Density
Color
Temperature
Weight
15
The oxide ion (O
2-
) has how many protons and electrons?
6 protons and 4 electrons
8 protons and 6 electrons
4 protons and 6 electrons
6 protons and 8 electrons
16
O
2-
, Ne, and Mg
2+
are isoelectronic. Which would you expect to have the larger ionic radius and why?
They would all be equal as they are isoelectronic
Ne - Neutral atoms are always larger than ions
O - It has the weakest (+) nucleus attracted to its electrons
Mg - It has the strongest (+) nucleus attracted to its electrons
17
How many δ-bonds and π-bonds are present in the molecule?
2 δ-bonds and 7 π-bonds
2 δ-bonds and 9 π-bonds
9 δ-bonds and 2 π-bonds
7 δ-bonds and 2 π-bonds
18
Which of the following compound formulas represents sodium nitride?
Na3N
SN
S3N2
NaN
19
How many moles of H
2
are there in 12.00 g?
6 moles
6.022 x 1023 moles
12 moles
24 moles
20
What is the approximate bond angle of ammonia?
180o
120o
90o
109.5o
21
What is 45.00 g/9.0 mL with the correct number of significant figures and units?
5.0 g
5.0 g/mL
5 g
5 g/mL
22
At constant volume, what happens to pressure if you cut temperature to a third of what it was?
It will decrease ÷3
It will increase x3
It will increase x2
It will decrease ÷2
23
What element has an atomic number of 12?
Magnesium
Manganese
Cobalt
Carbon
24
P is the elemental symbol that represents which element?
Phosphorus
Lead
Potassium
Plutonium
25
What is the name of FeO?
iron oxide
Iron (II) oxide
iron (I) oxide
Iron monoxide
26
A gas mixture contains 3.0 moles of Ne and 2.0 moles of Ar. What is the mole fraction of Ne in this mixture?
0.60
1.5
0.67
0.40
27
Element X tends to form ions with a -1 charge. Which group is element X most likely a part of?
Nobel Gases
Alkaline Earth Metals
Alkali Metals
Halogens
28
Which of the following displays the correct number of protons, number of neutrons, and mass for carbon-14?
6 p+, 8n, 14 amu
8 p+, 6n, 14 amu
6 p+, 14n, 20 amu
14 p+, 14n, 28 amu
29
300.0
o
C is equivalent to what temperature in Kelvin?
The mitochondria is the powerhouse of the cell
300.0 K
27.0 K
573.0 K
30
Samples were collected and burned creating the table below. What color would Cu(NO
3
)
2
be expected to burn?
Pink-lilac because of NO3-
White because it is an ionic compound
Blue-green becuase of Cu2+
Yellow-orange because NO3-
31
Which element symbol represents Tungsten
Zr
Ti
Te
W
32
How many hydrogen atoms are present in ammonium hydrogen phosphate? (NH
3
)
2
HPO
4
5
7
4
6
33
What is the appropriate name of CBr
4
?
Calcium tetrabromide
Carbon tetrabromide
Calcium bromide
Carbon bromide
34
Which statement regarding the polarity of CF
4
and CF
2
H
2
is correct?
Both molecules are polar because the C-F bond is polar
CF4 is polar, but CF2H2 is not because there are less C-F bonds
CF2H2 is polar becasue there is a net dipole
Neither are polar because of their tetrahedral molecular geometry
35
Which element is more electronegative, N or O, and why?
N - They are roughly the same size and it has less p+ in its (+) nucleus
O - It is smaller and able to bring its (+) nucleus closer
O - They are roughly the same size and it has more p+ in its (+) nucleus
N - It is smaller and able to bring its (+) nucleus closer
