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Chemistry Review for Exam
Chemistry Review for Exam
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A quiz for the reviewing of our exam in chemistry that is coming up soon.
Flashcards
74 cards
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Practice quiz
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Questions
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Answers
1
Atomic Mass is ...
Average mass of all of that atoms in the world
the mass of an atom
Average Mass of atom
Weight of an atom
2
What is the molar mass of glucose?
180.16
163.07
74.32
123.45
3
What is an excess reactant?
a reaction with excess products
a reactant that is first used up in a reaction
a excess reactant (grammar important for deciding if right)
reactant, where after reaction, has amounts of it left over
4
What is percent composition?
The percent of the total mass of an element in a compound
The total mass of an element in a compound
The percent by mass of a molecule in a compound
The percent by mass of an element in a compound
5
What type of compounds do polyatomic ions form?
Military compounds
Covalent compounds
Compound Interest
Ionic compounds
6
What is percent yield?
a percentage of yield
((mass of actual yield) / (mass of theoretical yield)) * 100
the percentage of the product after a chemical reaction
7
Rank the intermolecular forces (that we know of) by strength correctly using appropriate sign:
Hyrdogen > dipole dipole >> dispersion
Hyrdogen > london >> dipole dipole
hydrogen = dispersion = dipole dipole
Hyrdogen > dipole dipole <> dispersion
8
Organic Chemistry is ...
Whole Foods!
Stuff for bonus points maybe, not on test so do not care.
study of structure, properties, & reactions of organic stuff
Organic stuff is organic compounds but ran out of room
9
Why are molecules polar?
Elements being more electropositive & attracting electrons
I do not care
Molecules being more electronegative & attracting electrons
Elements being more electronegative & attracting electrons
10
What is theoretical yield?
a theory, a Chemistry theory
total possible amount of product produced in a reaction
the amount of the product produced in a chemical reaction
A yield of theories
11
If I disagree with the
APPLICATIONS
of the use of the science then this is...?
Secondary scientifc controversy
Confict over ethicality of methods
Conflict over applications
Confict between scientifc idea and non-scientific viewpoint.
12
An organic compound is ...
WHOLE FOOD's food.
Silcone containing (for the star trek fans)
Carbon containing, has carbon in it.
Hydrogen containing
13
Memorize This Pic ---->
Please pick me, or you will lose points
Remember do not trust everything you see online kids
This tells you how to go from grams, to moles, to # of atoms
This is the right answer*
14
Is the geometry of a molecule determined by the steric number of central element?
YES!
Maybe
No.
15
What is the Mole Method?
coefficients in equation can be interpreted as # of moles
protons in elements can be interpreted as # of electrons
moles in equation can be interpreted as # of coefficients
16
What are Sig Figs?
Significant Figures
Numbers in a number that important for rounding
Important numbers
The Most important thing to know for test.
17
What is a polar molecule?
A bond with zero/no net dipole force and forces cancel out
A molecule with a net dipole force in any direction
A bond located at the poles of the Earth
18
Okay. Back to studying. Next Question: What is a hydrogen bond?
A bond of hydrogen
Governmental bonds given out by hydrogen
Where hydrogen bonds with O, F, or N of another molecule
Weakest out of all intermolecular forces
19
1 mole == ?
1 blind brown creature that digs tunnels
6.02x10^-23
-602x10^23
6.02x10^23
20
What is a polyatomic ion?
a covalent molecule with net positive or negative charge
An ion made of many atoms
a ionic molecule with net positive or negative charge
a covalent molecule
21
Why is the Flat Earth idea, presented in the video, not scientific?
Little evidence to back it up :(
Tons of logical ideas that were put forth
Made by credible scientists, definitely.
No false balance at all in the video
22
What is VSEPR mean?
misspelled (in question) word meaning evening
A drink (also misspelled in question)
misspelled (missing an e) word meaning evening prayer
Valence Shell Electron Pair Repulsion Theory
23
Do you need to balance equations in order to figure out what type of reaction it is?
No? (remember to always be confident in your answers or else
No!
Yes!
Maybe, both yes and no options make strong cases
24
What is single replacement?
The replacement of a single electron by a proton
A dance
A molecule starts out alone, then replaces another element
The getting rid of and replacement of single objects
25
Can you Freeze Time? Question number - 7 = ----
R286IGh0dHBzOi8vZG9jcy5nb29nbGUuY29tL2RvY3VtZW50L2QvMWx
pdD91c3A9c2hhcmluZw==
HX1RVTE4ya1pMYXY3cEMyZ1M1aE9ORU83Smo5bERyd0FtUjl3MjNCTjgvZWR
Hmm, where have I seen this before?
26
How ma
N
y sig figs in 9310.00
7
6
4
3
27
What type of bonding is this (see image):
Ionic
Polar ionic
Non-polar ionic
Covalent
28
What is Stoichiometry?
A horrible, horrible thing. *flees room*
Quantitative study of reactants and products in a reaction
The thing chemistry is infamous for
Qualitative study of reactants and products in a reaction
29
What is a dipole-dipole force?
attractive force between polar molecules
unattractive force between polar molecules
attractive force between polar elements
attractive force between non-polar molecules
30
Now, just do some practice of this (actually do problems) and you are all set! YAY!
Must study all night long, no sleep!!!
Thank you and now I will go study some more problems
Well, this was a waste of time. I do not need to study
who cares about this class, not AP credit
31
What is a dipole?
A force of attraction for molecules
Separation of positive and negative charges
Combination of positive and negative charges
Two tadpoles combined
32
What is net dipole force?
General direction in which the electrons are attracted to
General direction in which the protons are attracted to
A net used to catch the dipoles
General direction in which electrons are pushed away from
33
What are the trends for Ionization energy in the periodic table?
decreases bottom to top and right to left
Same as electronegative trend
decreases top to bottom and right to left
increases top to bottom and right to left
34
What is the Electron Configuration of No
[Rn]5f^14 6d^1 7s^2
[Rn]5f^13 6d^1 7s^2 <--- LOOK CLOSELY BEFORE YOU PICK THIS
nothing, it is no
[Xe]5f^14 6d^1 7s^2
35
What is a mole?
A unit for conversion
A creature that is blind and digs tunnels underground
Spy who over a long period has an important position in gov
Mexican sauce made from chili peppers, chocolate on meat
36
What is a covalent bond?
A bond that shares electrons
A bond of sharing everything
A bond that shares neutrons
A bond that shares neutrons
37
How many s
I
g figs in 0.00707
6
5
2
3
38
If I disagree with a major theory that would disrupt the scientific world that would be....?
Confict over ethicality of methods
Fundamental scientifc controversy
Confict over ethicality of methods
Confict over ethicality of methods
39
Are you ready for Quiz? MAKE SURE TO PAY ATTENTION TO EVERYTHING! Work Together for puzzle :)
I JUST want to sleep
Lets do this!
I can't wait to study, so I can get an A!
Wait is something hidden in the kahoot? At the End?
40
What is the formula for calculating formal charge of an element?
(inverse of matrix A) * (matrix B) = [c]
# of valence electrons - lone pairs - #of bonds
(Tests) * (Homework) = stress
# of valence electrons - # of protons - #of bonds
41
Does geometry of molecule affect and determine polarity of a molecule?
No, cause geometry is math, and math is not science
Neurtal/Can't decide, both options make good claims
Yes, so I should definitely study the geometry of molecules
42
What is an Intermolecular force?
Forces that are within elements
An organization within molecules
Forces that are between molecules
Forces that are between space and non-space
43
What is Avogadro's number?
6.02x10^23
6.02x10^24
602x10^23
6.0.2x10^23
44
The trend in the periodic table about atomic radius shows that ...
Atomic radius increases down to up right to left
Atomic radius increases down to up left to right
Atomic radius increases up to down right to left
Atomic radius increases up to down left to right
45
What is decomposition?
When an element reacts that leads to being broken down
When molecule reacts that leads to being broken upside-down
When an molecule reacts that leads to being broken down
When a molecule reacts that leads to being broken up
46
What is this?
Combustion
An explosion
Decomposition
synthesis
47
Balance The Equation in the pic ---->
3CaSiO3 + 6HF ----> 2CaF2 + 6SiF4 +3H2O
77CaSiO3 + 6HF ----> 123CaF2 + 42SiF4 + 21H2O
CaSiO3 + 6HF ----> CaF2 + SiF4 +3H2O
1CaSiO3 + 6HF ----> 1CaF2 + 1SiF4 +3H2O
48
What is a Lewis Dot Structure?
Way of showing elements and their valence electrons & bonds
A dotted potrait of Lewis
A way of showing elements and thier valence protons & bonds
A way of showing elements and their valence neutrons & bonds
49
What is a London (dispersion) Force?
The force it takes to have London's bridges fall
temporary dipoles occur by random jumps in electron cloud
(not an answer)
Happens to with I(subnote-2)
50
If I disagree with you about gene editing over ethics, this is what type of controversy?
Secondary scientifc controversy
Confict over applications
Confict over ethicality of methods
Confict between scientifc idea and non-scientific viewpoint.
51
An isotope of an element is ...?
Same number of neutrons, but not electrons
Same number of neutrons, but not protons
Same number of protons, but not neutrons
nothing different from the element
52
What is an ionic bond?
A giving up of electron(s) from one element to another
A sharing of electrons between molecules
What is an ionic bond?
A giving up of proton(s) from one element to another
53
What is combustion (chemistry definition)?
Molecules with F and H react with O2 to produce SO4 and H2O
the process of burning something
An explosion (see pic)
Molecules with C and H react with O2 to produce CO2 and H2O
54
K
alculate: 10.99 x 7.0
77.2
76.93
77
76
55
What is order of number of electrons in shell (the simple version)?
1, 2, 3, 4, 5, etc.
8, 8, 2, ...
2, 6, 10, ...
2, 8, 8, ...
56
Hey! Its been a lot of tough questions. So for a break, here is an easy one. What does 42 mean?
42 = 42, It means nothing <- Wrong.
it is a numerical representation to represent 42 things
the * which means anything you want it to be
The ultimate answer to Life, the Universe, and Everything
57
Memorize this pic --->
*Remember what happened to Othello when he trusted people
I am the right answer, trust me please*
How ones uses mass of a compound to find mass of another one
Pick this option, it is right.
58
How many electrons can a d shell hold at max?
10
2
1
7
59
Who is your favorite teacher?
Just Singleton
Just Singleton
Just Singleton
Just Singleton
60
Molar Mass is...?
liters per mole that molecule weighs
cm^3 per mole that molecule weighs
grams per mole that molecule weighs
Mass of a mole
61
Where M is mAss, V is volume, and D is Density. All of these are true except:
D = M/V
V = D/M
V = M/D
M=DV
62
What is a resonance structure?
The Lewis dot diagram of that molecule
Stuff needed to know for bonus points for previous tests
A stucture that is another form of the same molecule
The structure of a molecule
63
What is Double Replacement?
Single Replacement x2
A replacement of two things
Positive and negative ions in two compounds switch places
Everyone has a dancing partner, like multiplying matrices
64
What is a non-polar (covalent) molecules?
A polar bond
A molecule that is found at the poles of non-space
Has an aysmmetrical bond
Molecule has no net dipole, & no forces effecting electrons
65
What is a steric number of an molecule?
# of pairs of protons (bonds and lone pairs)
# of pairs of electrons (bonds and lone pairs)
Relating to the spatial arrangement of atoms in a molecule
# of pairs of neutrons (bonds and lone pairs)
66
Balance Reaction shown in the Picture --->
CH4 + 2O2 ----> CO2 + 2H2O
CH4 + 3O2 ----> CO2 + 2H2O
2CH4 + 4O2 ----> 2CO2 + 4H2O
CH4 + 3O2 ----> CO2 + 4H2O
67
What is synthesis?
a reaction where a compound is made from simpler materials
a reaction where a compound is made from harder materials
a reaction where a compound is made from complex materials
a reaction where a compound is made from softer materials
68
H
O
w many sig figs in 90
2
1
3
5
69
Electronegativity is ...
An atom's ablity to attract and pull electrons closer to it
Negative electrons
Electricity with a neagtive force
An atom's ablity to push away electrons farther from it
70
What is the shape of a s orbital?
Squarical
Squareish
Spherical
Circle
71
What is ionization energy?
Opposite of Electropositivity
Engery required to remove protons
Engery required to attract electrons
Engery required to remove electrons
72
What is the misconceived idea of the scientific method?
The procedure is one great flow chart like in the picture.
The procedure should be logical/systematic
Follows steps: Make observation, hypothesis, and then test
There is no misconecption of the procedure.
73
What is a limiting reactant?
reactant with greater quantities than necessary for reaction
the reactant NOT first used up in a reaction
Something that limits the reaction
the reactant first used up in a reaction
74
What is a valence electron?
An Electron
The electrons in the innermost shell
The electron(s) in the outermost shell
The electron in the outermost shell
