WorksheetsUnit 2 Quiz 2 ChemII F25
Total questions: 150
Worksheet time: 4hrs 52mins
A 4.175 gram sample of a certain hydrate of copper (II) sulfate, CuSO4•xH2O, is heated until all the water is driven off. The resulting anhydrous compound weighs 3.120 grams. What is the formula of the hydrate?
CuSO4•H2O
CuSO4•3H2O
CuSO4•6H2O
CuSO4•4H2O
A 5.018 gram sample of a certain hydrate of magnesium sulfate, MgSO4•xH2O, is heated until all the water is driven off. The resulting anhydrous compound weighs 2.449 grams. What is the formula of the hydrate?
MgSO4•9H2O
MgSO4•8H2O
MgSO4•7H2O
MgSO4•6H2O
Calculate the percent by mass of water in the hydrate Na2CO3 ⋅ 10H2O. Be sure to round all masses from the Periodic Table to the nearest tenth and round the percent water to the correct number of significant figures. Include the correct unit with your numerical answer.
(a)
Calculate the percent by mass of water in the hydrate FeCl3 ⋅ 6H2O. Be sure to round all masses from the Periodic Table to the nearest tenth and round the percent water to the correct number of significant figures. Include the correct unit with your numerical answer.
(a)
When naming oxyacids, change "-ite" to:
-ate
-ic
-ous
-ite
Antimony tribromide
AnBr3
AtBr3
Sb1Br3
SbBr3
Hexaboron monosilicide
B5S
B6S
B6Si
Br6Si1
Br6Si
Si2Br6
silicon bromide
disilicide bromide
disilicon hexabromide
disilicide hexabromide
Name the ionic compound SnSe2
Tin diselenide
Tin (IV) Selenide
Tin selenide
Tin (II) triselenide
What is the name of the compound Sc(OH)3?
Scandium (III) hydroxide
Scandium (I) hydroxide
Scandium (II) hydroxide
Scandium hydroxide
Cr3+ O2-
K1+ S2-
Hydrogen nitrite (nitrous acid)
Ca(CO3)
Pb4+ O2-
Sr+2 + (CO3)-2
Cr3+ O2-
K1+ S2-
Name the following compound: Fe2O3
iron oxide
iron oxygen
iron (II) oxide
iron (III) oxide
· Fe(C2H3O2)3 · Ba(NO3)2 · Li2O
Which of the answer choices contain the correct name for each of the compounds?
When the anion has a suffix of -ide, what will the binary acid name be?
___ic Acid
___ous Acid
Hydro___ic Acid
What is the suffix of an anion when the acid name includes ___ous Acid?
-ate
-ite
-ide
Binary acids consist of oxygen, hydrogen, and one other element
True
False
Oxyacids contain hydrogen, oxygen, and one other element?
True
False
What is the formula for Sulfuric acid?
H2SO4
HSO
H3SO3
What is the formula for Phosphorous acid?
H3PO4
H3PO3
HPO2
What is the formula for Nitrous acid?
HNO2
H2NO
H2NO2
What is the formula for hydrochloric acid?
HCl
HClO
H3ClO3
HClO3
Binary acids start with the prefix "____________"
acid
nitric
hydraulic
hydro
When naming binary acids, the ending always changes to:
-ate
-ite
-ic
-ous
When naming oxyacids, change "-ite" to:
-ate
-ic
-ous
-ite
Name this acid: H2SO4
hydrogen sulfate
hydrosulfuric acid
sulfuric acid
sulfurous acid
Which of these is part of Dalton's atomic theory?
Every element is identical on the atomic level
Atoms are made of elements
Two atoms of the same element are identical
Atoms never interact with other atoms
In the chocolate chip cookie model, the "DOUGH" was thought to have a(n)…
Average charge of 5
Negative charge
Positive charge
Neutral charge
How did the Gold Foil experiment DISPROVE the chocolate chip cookie model of the atom? (2 answers)
The chocolate chip cookie model didn't account for a nucleus in the center; the α-particles bounced off this nucleus
The α-particles bounced off the electrons in the center of the atom
The α-particles that got close enough to the nucleus were curved/deflected
The α-particles turned into energy and cooked the cookie which is delicious
The electrons were too small to deflect the α-particle
What's the difference between these two atomic models?
The Bohr model has specific paths for the electrons, whereas the Rutherford model just has electrons wherever
The Bohr model has a nucleus and the Rutherford model doesn't
The Rutherford model has electrons because Rutherford discovered the electron
Rutherford's model is slightly smaller because Bohr felt like he deserved it
The Bohr model is the first atomic model to describe electron shells. What does this mean?
Calcium carbonate exoskeletons to protect the electrons from predators
Special places the electron can be without the nucleus interfering
Levels and paths that the electrons travel around when they orbit the nucleus
Quantum spin probabilities which account for electron momentum
Which is NOT a feature of the Bohr model?
Nucleus in the middle
Electrons on specific paths
Electrons orbiting the nucleus
Neutrons in the nucleus
More than 1 electron
The Heisenburg Uncertainty Principal states that if you know the _______, you do not know the momentum of an electron
Positive charge value
Position
Vector path
Speed
Why do we talk about Heisenberg in our study of the development of atomic models?
Because he predicted the possibility of neutrons
Because his research proved that the Bohr model was ALMOST but not quite correct
Because nobody understood that electrons were smaller than protons
Because he was BFFs with Schrodinger and wanted to be included
Because he was the only one who didn't assume electrons behaved like protons
Ultimately, Schrodinger's model had electrons in ______ around the nucleus
Specific orbits
Nodes
Waves
Clouds
What does this graph indicate?
The probability of an electron touching the nucleus is 100%
The Schrodinger model allows for the electrons to be anywhere they feel like
The likelihood of an electron's position depends on its distance from the nucleus
That Aristotle was WRONG and he should feel bad :(
What is a node?
A space between electron shells
The region where an electron is least likely to be
Where the probability graph has Y=0
A region that is not part of an electron shell
Whose model is closest to the currently accepted standard?
Democritus's "Pumpkin is made of pumpkin atoms"
Chocolate Chip Cookie model
Bohr's atomic orbits
Wave Mechanical Model
discovered the electron
discovered the nucleus
discovered energy levels
discovered the atom
atom model
atom model
atom model
atom model
had 4 postulates
discovered the electron
discovered the nucleus
discovered energy levels
noticed the energies given off were always the same
gold foil experiment
cathode ray tube
broke substances down and realized the products were always in a fixed ratio
An atom of Aluminum had a charge of +3, how many protons does aluminum have?
(a)
If this atom had a charge of positive 1, how many neutrons are in this atom on average?
(a)
An atom of sodium has a +1 charge, how many electrons would this atom of sodium have?
(a)
Label the parts of an atom.
nucleus
outer shell
proton
neutron
electron
Label the parts of an atom based on who discovered it.
Bohr
Rutherford
JJ Thomson
What is the atomic mass?
Match the following
Neutral Atom
Positive Carbon Ion
Negative Boron Atom
Negative Carbon Ion
Negative Atom
Match the following
Mass = 19 amu
Positive
Mass = 12 amu
Mass = 11 amu
Mass = 12 amu
Mass = 18 amu
Organize these options into the right categories.
dictates the atom's charge
if it changes, the mass of the atom changes
if it changes, the element changes
equals the atomic number
equals the number of protons if it is neutral
equals the mass minus the number of protons
positive
negative
neutral
Which choice(s) below are/is needed to get density?
Water
Volume
Mass
Avocado
The formula for density is:
Mass + volume
Mass - volume
mass x volume
mass ÷ volume
Just mass/just volume
Mass alone tells you its relative density.
True
False
Volume alone tells you its relative density.
False
True
Fire burning a forest is a chemical change.
True
False
Which choices below are physical changes?
Dented Hydro Flask! Oh no!
Fireworks exploding
Candle burning
Candle wax melting
All of the above
Which choices below are chemical changes?
Baking a cake
Cracking an egg open
Digesting the egg
Eating the cake
All of the above
Mass is measured in (a) .
BRAIN BREAK! Choose the biggest number.
-17
-56
20
100000000000000
-35.978583246898654783638365
Changing state is a (a) change.
Baking is a (a) change.
Poll: BRAIN BREAK: e
Yes
No
W A T
:P
Which Student is the most Precise?
Alex
Shandra
Luis
I2O5 + 5CO → 5CO2 + I2
Consider the reaction above. If 80 grams of iodine (V) oxide reacts with 28.0 grams of carbon monoxide. Determine the limiting reactant of iodine gas.
I2O5
CO
CO2
I2
I2O5 + 5CO → 5CO2 + I2
Consider the reaction above. If 80 grams of iodine (V) oxide reacts with 28.0 grams of carbon monoxide. What is the mass, theoretical yield of iodine gas. Give your answer to 1 decimal place and include the appropriate unit.
(a)
3FeCl2 + 2Na3PO4 → Fe3(PO4)2 + 6NaCl
If 23 grams of iron (II) chloride reacts with 41 grams of sodium phosphate. Determine the limiting reactant
Fe3(PO4)2
Na3PO4
FeCl2
NaCl
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
When 160 g of copper reacts with 200 g of silver nitrate according to the equation above, the limiting reactant of copper (II) nitrate is (a) and the theoretical yield is (b)
Cu(NO3)2
110.4 g
How many neutrons are in an isotope of lead with a mass of 206?
125
82
124
83
A certain element has two isotopes with masses of 113 amu and 115 amu, which have an abundance of 4.28% and 95.72% respectively. What is the average atomic mass of this element?
114.91 amu
158.44 amu
113.09 amu
[Kr]5s14d7
Ruthenium has the ground-state electron configuration shown above. How many valence electrons does a ground-state atom of ruthenium have?
1
8
7
2
Which of the following electron configurations represents an atom in the ground-state?
1s22s22p63s13p64s1
1s22s22p63s23p64s23d7
1s22s12p63s23p5
1s22s22p53s23p64s23d9
Which of the following represents the ground-state electron configuration for the gold (I) ion, Au+?
[Xe]6s24f145d9
[Xe]6s14f145d9
[Xe]4f145d9
[Xe]6s15d9
1s22s22p53s23p64s23d7
How many unpaired electrons are in an atom with the above electron configuration?
4
1
2
3
Shown above is the infrared absorption spectrum for D-glucose, which indicates the types of bonds present in the molecular structure. Which of the following describes the molecular change in D-glucose caused by infrared radiation?
Infrared radiation causes the bonds to break and rotate.
Infrared radiation causes the entire molecule to rotate.
Infrared radiation causes bonds to stretch and vibrate.
Infrared radiation causes electron held in bonds to move to an excited state.
Shown above is the completed photoelectron spectrum for an element. What is the most likely identity of this element?
Be
B
C
F
Based on the image above, which of the following types of electromagnetic radiation would have the greatest frequency?
X-ray
Microwave
Visible
Radio
Based on the calibration curve shown above for phenol red, a solution of phenol red with an absorbance of 0.20 will have a concentration of
3.0 μM
4.5 μM
1.2 μM
2.0 μM
Shown above is the mass spectrum for a pure sample of an element. Which of the following is the most likely identity of the element?
Y
Sr
Fr
Ra
Shown above is the mass spectrum taken from a pure sample of an element. Based on the mass spectrum, how many isotopes of this element exist?
3
2
1
4
Shown above is the mass spectrum of a pure sample of tin, Sn. How many neutrons are in the most abundant isotope of tin?
(a)
Shown above is the linear regression produced from the aborbance of phenol red measured at several different concentrations using cuvettes with a path length of 1.0 cm. Based on the linear regression, what is the molar absorptivity of phenol red?
0.067 μM-1 cm-1
15 μM-1 cm-1
0.67 μM-1 cm-1
1.5 μM-1 cm-1
Which bar graph is the same as the data in the circle graph if 20 people were surveyed?
A statement of what will happen when the hyphothesis is tested.
proportion
precision
prediction
scientific guess
Assessment of scientific research by other scientists working in the same domain.
method
peer review
median
measurement
If two substances are miscible, when mixed together they form
an immiscion
a solution
an explosion
an aliquot
A solution in which the solute has dissociated into ions to a large degree
If you dilute 175 mL of a 1.6 M solution of LiCl to 1.0 L, determine the new concentration of the solution.
2.2 M
0.28 M
4.3 M
5 M
You need to make 10.0 L of 1.2 M KNO3. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it?
4.8 M
4.2 M
2.8 M
3.3 M
To what volume should you dilute 133 mL of an 7.90 M CuCl2 solution so that 51.5 mL of the diluted solution contains 4.49 g CuCl2?
420 L
1140 mL
1620 mL
3000 L
I have a stock solution of sodium acetate equal to 10M. I want 0.5 L of a 0.3 M solution of sodium acetate. How much of 10M stock do I need?
15 mL
20 L
21 mL
22 mL
How many mL do I add to create 150 mL of 0.3 M solution? Stock is 12 M.
3.3 L
3.75 mL
4 L
2.4 L
Match the following
solute
the substance being dissolved
solvent
the substance doing the dissolving
solution
homogeneous mixture
solubility
the ability of a substance to dissolve
solvation
the process of dissolving
Homogeneous Mixture
substance containing two or more components that are blended uniformly
Suspension
Heterogeneous mixture containing a liquid, & in which visible particles slowly settle to the botto
Colloid
Heterogeneous mixture whose particles never settle
Tyndall Effect
Tendency for a beam of light to scatter as it passes through a colloid
Compound
Substance in with the atoms of two or more elements are combined in a fixed proportion
a change in participants illness or behavior that results from a belief that the treatment will have an effect rather than from the actual treatment
Placebo Effect
Self-Fulfilling Prophecy
Longitudinal Study
Control Group
