16167632
Descrição
Quiz por Princess Stark, atualizado more than 1 year ago
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Criado por Princess Stark
aproximadamente 6 anos atrás
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Questão 1
Questão
Give the number of nonbonding lone pairs electrons in H2NOH
Responda
-
0
-
1
-
2
-
3
-
4
Questão 2
Questão
The compound methyl amine, CH3NH2, contains a C-N bond. In this bond, which of the following best describes the change on the nitrogen atom ?
Responda
-
slightly positive
-
-1
-
+1
-
unchanged
-
slightly negative
Questão 3
Questão
Which of the compounds below have bonds that are predominantly ionic?
Responda
-
NH3
-
KCl
-
CF4
-
both a and B
-
both b and c
Questão 4
Questão
What type of bonding is most important in CH3CH2CH2CH2CH2CH3?
Responda
-
covalent
-
ionic
-
hydrogen
-
polar
Questão 5
Questão
Which of the following contains polar covalent bonds ?
Responda
-
NH2
-
Na2O
-
KF
-
H2
-
both a and c
Questão 6
Questão
Which of the following covalent bonds has the largest dipole moment ?
Responda
-
H-N
-
C-O
-
H-F
-
C-C
-
C-H
Questão 7
Questão
Which of the following elements does this electronic configuration represent 1s2 2s2 2p5?
Responda
-
C
-
Al
-
N
-
F
-
O
Questão 8
Questão
The formal charge on the nitrogen in the compound below is
Responda
-
+2
-
+1
-
-2
-
0
-
-1
Questão 9
Questão
which of the following is the most likely electronic structure for C2H2 ?
Responda
-
H-C-C-H
Questão 10
Questão
Which of the following structures, including formal charges, is correct for diazomethane, CH2N2?
Responda
Questão 11
Questão
What are the formal charge on nitrogen and the starred oxygen atom in the following molecule ?
Responda
-
N=+1 , O=0
-
N=-1, O=0
-
N=-1, O=-1
-
N=+1, O=-1
-
N=+1 , O=+1
Questão 12
Questão
How many unpaired electrons are present in the isolated carbon atom (atomic number =6) ?
Responda
-
none
-
one
-
two
-
three
-
four
Questão 13
Questão
Give the formal charge on nitrogen in NH4.
Responda
-
-2
-
-1
-
0
-
+1
-
+2
Questão 14
Questão
Which of the following is the electronic configuration of the element Fe?
Responda
-
1s2 2s2 2p6 3s2 3p6 4s2 4d6
-
1s2 2s2 2p6 3s2 3p8 3d6
-
1s2 2s2 2p6 3s2 3p6 4s2 3d6
-
1s2 2s2 2p8 3s2 3p6 4s2 3d6
Questão 15
Questão
The atomic number of boron is 5. The correct electronic configuration of boron is
Responda
-
2s2 2p3
-
1s2 2s3
-
1s2 2p3
-
1s2 2s2 2p1
-
1s2 2s2 3s1
Questão 16
Questão
Give the electronic configuration of N-3
Responda
-
1s2 2s2 2p6
-
1s2 2s2 2p3
-
1s2 2s2
-
1s2 2s2 2p6 3s1
-
1s2 2s2 2p4
Questão 17
Questão
Convert the model below into skeletal structure
Responda
-
1
-
II
-
III
-
IV
-
V
Questão 18
Questão
Propanol is a compound detected on the surface of comet 67P by the Philae Lander. How many hydrogen atoms are present at the indicated Carbon?
Responda
-
0
-
1
-
2
-
3
-
4
Questão 19
Questão
Which of the following is not a conjugate acid-base pair?
Responda
-
H2SO4-, H2SO4
-
H2O, HO-
-
-OH, O2-
-
H2O, H3O+
-
NO3-, NO2-
Questão 20
Questão
Which of the following is the strongest acid ?
Responda
-
CH3NH3+
-
CH3NH2
-
CH3OH
-
CH3OH2+
-
H2N-
Questão 21
Questão
The pKa of CH3COOH is a 4.8 and the pKa of HCOOH is 3.8. Given the information, one knows that
Responda
-
CH3COOH completely ionizes in water
-
CH3COOH reacts with HO- while HCOOH does not
-
HCOOH is a weaker acid than CH2COOH
-
HCOOH reacts with HO- CH3COOH does not
-
HCOO- is a weaker base than CH3COO-
Questão 22
Questão
Identify the compound with the highest pKa
Responda
-
CH3NH2
-
CH3NH3+
-
CH3OH
-
CH3COOH
-
H2O
Questão 23
Questão
what is the product formed from the following acid-base reaction when ammonia functions as a base? The equilibrium lies far to the reactants
Responda
-
CH2OH + +NH3
-
CH4 +NH2OH
-
CH3NH2 +H2O
-
CH3O- + +NH4
-
CH3OH2+ + -NH2
Questão 24
Questão
Identify the compound with the highest pKa
Responda
-
HCCN
-
CH3NH2
-
CH2CH2
-
CH3CH3
-
CH3OH
Questão 25
Questão
When a small amount of hexanoic acid [CH3(CH2)4CO2H, pka -4.8], is added to a separator funnel which contains the organic solvent diethyl ether and water with a pH of 2.0, it is found mainly in the ____ phase as ______.
Responda
-
ether; CH3(CH2)4CO2H
-
water; CH3(CH2)4CO2-
-
ether; CH3(CH2)4CO2-
-
water; CH3(CH2)4CO2H
-
none of the above
Questão 26
Questão
When a small amount of hexanoic acid [CH3(CH2)4CO2H, pka -4.8], is added to a separate funnel which contains the organic solvent diethyl ether and water with a pH of 12.0, it is found mainly in the ____ phase as ______.
Responda
-
water; CH3(CH2)4CO2-
-
water; CH3(CH2)4CO2H
-
ether; CH3(CH2)4CO2-
-
ether; CH3(CH2)4CO2H
-
none of the above
Questão 27
Questão
The conjugate acid of H2O is
Responda
-
H3O+
-
HO-
-
H2O+
-
H3O-
-
H3O
Questão 28
Questão
H-A is an acid with a pka of 4.5. Which of the following statements about an aqueous solution of H-A is true?
Responda
-
at pH= 5.5, the solution contains about 90% A- and 10% H-A.
-
At pH= 3.5, the solution contains about 90% A- and 10% H-A
-
At pH= 6.5, the solution contains about 80% A- and 20% H-A.
-
at pH=4.5, the solution contains much more A- than H-A.
-
at pH= 4.5, the solution contains much more H-A than A-.
Questão 29
Questão
Which of the following ions is the strongest acid?
Responda
-
H30+
-
HSO4-
-
HO-
-
H-
-
H2)
Questão 30
Questão
What would be the conjugate base in the following acid base reaction
Responda
-
CH3S-
-
H2O
-
CH2O
-
CH3SH2+
-
CH3OH
Questão 31
Questão
What would be the conjugate acid in the following acid base reactions
Responda
-
CH3S-
-
CH2O
-
CH3OH
-
H2O
-
CH3SH2+
Questão 32
Questão
Which of the following species cannot function as a lewis Acid ?
Responda
-
H2O
-
TiCl4
-
AlCl3
-
NH4+
-
H+
Questão 33
Questão
What is the conjugate acid of NH3 ?
Responda
-
+NH4
-
-NH
-
-NH2
-
+NH2
-
+NH3
Questão 34
Questão
What is the conjugate acid of CH3NH2?
Responda
-
CH3NH-
-
CH3NH3+
-
NH4+
-
NH2-
Questão 35
Questão
What is the conjugate base of CH3NH2?
Responda
-
NH4+
-
CH3NH-
-
NH2-
-
CH3NH3+
Questão 36
Questão
Ar there any conditions under which a student may work alone ?
Responda
-
maybe
-
yes
-
no
-
students may work unrestricted at their convenience
Questão 37
Questão
In case of an emergency in the lab, who should be notified ?
Responda
-
instructor
-
anybody
-
SOuthern University Police
-
a friend
Questão 38
Questão
What precautions are needed with long hair and breads?
Responda
-
must be shampooed
-
keep long hair tied back/ keep hair away from flames
-
no precautions are necessary
-
no long hair and/ or beards allowed in laboratory
Questão 39
Questão
What should be the very last function performed in the laboratory before you leave?
Responda
-
make sure that your locker is secure
-
wash your hands
-
bid the instructor farewell
-
arrange a time with you laboratory partner for lunch
Questão 40
Questão
What should be worn in a laboratory at all times?
Responda
-
contact lenses
-
mask
-
a cap
-
safety glasses
Questão 41
Questão
When adding a solid metal to water, the metal will:
Responda
-
dissolve
-
displace its volume
-
lower the liquid volume
-
form a homogenous mixture
Questão 42
Questão
Why is smoking not permitted in the lab ?
Responda
-
it is bad for your health
-
the laboratory could be blown up
-
it is inconvenient
-
there are no ash trays in the lab
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