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SSIS chemistry
SSIS chemistry
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1
A strong acid will react with a strong base to produce ...
a weak acid and weak base
water and a salt
2
the first energy level holds 8 electrons
False
True
3
what type of reaction is BaCl2(aq) + H2SO4(aq) → 2HCl(aq) + BaSO4(s)
double displacement
synthesis
single displacement
combustion
4
Metals tend to lose electrons to achieve an octet
False
True
5
Which of the following is characteristic of a base
sour taste
has pH below 7
turns litmus paper red
turns litmus paper blue
6
How many valence electrons are in C2H4
13
10
12
14
7
What is the name of the ionic compound NaOH
Natrium oxide
hydroxide
sodium hydroxide
Sodium oxide
8
a bond between two chlorine atoms is a polar covalent bond
True
False
9
Which of the following is a covalent compound
CO2
NaOH
MgO
BaCl2
10
A pH less than 7 is considered to be...
neutral
basic
acidic
11
ionic compounds are usually formed between..
metals and transition metals
non-metals and metals
non-metals and non-metals
non-metals and transition metals
12
When naming the first element of an ionic compound you put the greek prefix "mono-" in front of the element name
False
True
13
when Fluorine becomes an ion it has the electronic configuration of Neon
False
True
14
What is the name of the polyatomic ion [NH4]+
ammonium
ammonia
nitrogen tetrahydride
acetic acid
15
How many electrons does the p-orbital hold?
2
6
3
8
16
the formal charge of each atom in an ion will add up to equal the total charge on that ion.
False
True
17
if an atom has 4 electron domains and only 2 of them are bonded atoms what is the molecular geometry?
trigonal planar
tetrahedral
linear
bent
18
A Bronsted-Lowrey Acid is a...
non-electrolyte
hydrogen ion acceptor
hydroxide ion donor
hydrogen ion donor
19
What is the formal charge on carbon in the cyanide ion?
-2
0
1
-1
20
non-metals can form ions with multiple oxidation states
False
True
21
Which of the following titrations will have a basic pH at its equivalence point?
CH3COOH and NH3
NH3 and HCl
CH3COOH and NaOH
HCl and NaOH
22
Which of the following is transition metal ionic compound?
CSe2
CaF2
ZnCl3
SiO2
23
diatomic oxygen O2 is an example of
an element
a molecule
a compound
a molecule and an element
24
which of the following do you need to use to convert 5 grams of CH4 to moles of CH4
avagadro's number
the molar mass of CH4
25
If you have 15.0x10^19 molecules of water and need to know how many moles of water you have you will...
divide by the molar mass
multiply by 6.022x10^23
divide by 6.022x10^23
multiply by the molar mass
26
A buffer solution is composed of...
a strong acid and weak base
a weak acid and its conjugate base
a weak base and strong acid
any weak acid and any weak base
27
non-metals binding to non-metals tend to have...
covalent bonds
ionic bonds
28
which of the following is a hydronium ion?
OH-
H3O+
H+
H-
29
AB + CD → AD + CB is an example of a...
Single displacement reaction
double displacement reaction
Synthesis reaction
Decomposition reaction
30
how many electrons can occupy the 3rd energy level?
6
18
10
8
31
When a substance heats up the molecules are...
moving slower
moving faster
32
What is the atomic number of an atom?
the number of protons and neutrons
the number of electrons
the number of protons
the number of neutrons
33
Which of the following is a transition metal?
Pb
Si
Cs
Ar
34
the chemical formula of calcium bromide is CaBr
False
True
35
in gel electrophoresis positively charged dye molecules moved towards the
positively charged cathode
negatively charged anode.
36
All ionic formulas are empirical formulas
False
True
37
Which of the following is an example of a pure substance?
milk
salt water
Glucose
maple syrup
38
Acid- base reactions all involve the transfer of _________ from one molecule to another.
protons
electrons
39
CH3COO- and CH3COH are conjugate acid base pairs
True
False
40
a strong electrolyte....
maintains a neutral pH
partially dissociates
conducts electricity
does not conduct electricity
41
what type of reaction is CH4(g) + O2 → CO2(g) + H2O(g)
decomposition
double displacement
combustion
combination
42
the pH and pOH of any solution always adds up to 14
False
True
43
at equilibrium the rate of the forward reaction is greater than the rate of the reverse reaction.
True
False
44
When the temperature of a material is lowered the average kinetic energy of the material has increased
True
False
45
Cations are...
Negatively charged
positively charged
46
At the equivalence point in a titration the number of moles of acid is equal to the number of moles of base.
False
True
47
in the chemical formula of Niobium(v)Selenide what is the subscript of Nb and Se respectively
Nb2Se5
NbSe2
Nb5Se2
Nb4Se2
48
Is wax freezing a physical reaction or a chemical reaction?
chemical
physical
49
When an acid is added to a base a _______________ reaction occurs
percipitation
neutralization
50
Which of the following is the correct mathematical expression for pH?
-log[H+]
log[OH-]
ka=[OH-]/[H+]
-log[OH-]
51
Nitrate has how many oxygen atoms?
4
3
2
1
52
phenothailine dye indicator turns pink when the solution is...
acidic
basic
53
which of the following is sulfide?
S 2-
SO3 2-
SO4 2-
S2O3 2-
54
NH3 and NH4+ are conjugate acid base pairs?
False
True
55
When naming ionic compounds you use greek prefixes
False
True
56
How many molecules are in a Mole?
602.0x10^15
8.09x10^23
6.022x10^15
6.022x10^23
57
A weak acid ionizes completely in aqueous solution
False
True
58
A buffer solution made of 2.0 moles of NH3 and 1.0 mole of NH4+ can resist a pH change when 1.5 moles of HCl are added.
True
False
59
What is the oxidation state of oxygen in the ionic compound FeO?
-3
-2
-1
0
60
all atoms of one element are identical in all properties
True
False
61
water can act as both an acid and a base
True
False
