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WorksheetsFinal exam review Chemistry CP4
Total questions: 81
Worksheet time: 47mins
This could be the dot diagram of which element?
O
V
C
Cl
Oxygen is a gas important for life and it represents about 21% of the Earth’s atmosphere. Which of the illustrations below best represents a Bohr diagram of an oxygen atom?
How many electrons does Bismuth have?
(a)
How many Neutrons does Bismuth have?
(a)
How many energy levels does Bismuth have?
(a)
How many valence electrons does Bismuth have?
(a)
Which Alkaline Earth Metal has atoms with 4 energy levels?
Sr
Ca
K
I
How many neutrons will an atom of Krypton have?
36
48
84
47.8
What is the volume of spongebob?
52 mL
33 mL
2 mL
36 mL
An object is most likely to sink in water if its density is ______________ the density of water.
greater than
less than
equal to
Which one of the polystyrene balls (Styrofoam) shown above will be the most dense?
The smallest ball.
The largest ball.
It's a trick question! Since they're all the same substance, they will all have the same density.
Use the following equation to answer the question:
3 CaCO3 + 2 H3PO4 → Ca3(PO4)2 + 3 CO2 + H2O
If 1.5 moles of calcium carbonate are reacted, how many moles of water will be formed?
0.25 mol
0.50 mol
1.0 mol
1.5 mol
Use the following equation to answer the question:
Fe2O3 + 3 Mg(NO3)2 → 2 Fe(NO3)3 + 3 MgO
If 0.5 moles of Mg(NO3)2 is reacted, how many moles of MgO would be produced?
1 mol
2 mol
0.5 mol
1.5 mol
3 CuSO4 + 2 Al → 3 Cu + Al2(SO4)3
According to the equation above, 3 moles of copper (II) sulfate and 2 moles of aluminum produce 3 moles of copper and 1 mole of aluminum sulfate. If 6 moles of copper (II) sulfate are reacted with 4 moles of aluminum, how many moles of copper will be formed?
2 mol
4 mol
6 mol
8 mol
Study the picture. How could you lower the pressure?
Increase the volume
Decrease the volume
Increase the temperature
Add more of Gas A
If the temperature of 2 Liters of gas is changed from 70˚C to 325˚C, what would be the final volume?
9.29 L
0.43 L
3487 mL
1147 mL
A pressure of 745 mm Hg equals____________.
1 torr.
745 torr.
1 atm
745 atm
The standard molar volume of a gas at STP is____________.
g/22.4 L.
g-mol wt/22.4 L.
22.4 L
1 L
What is the chemical formula for calcium oxide?
(a)
The electrons involved in the formation of a chemical bond are called___________
dipoles.
valence electrons.
s electrons.
Lewis electrons.
Order the events that occur to establish an ionic bond.
A. An ionic bond occurs due to to the attractive forces between the cation and anion.
B. A metal transfers its valence electron(s)
C. The anion is negatively charged.
D. A nonmetal gains a/an valance electron(s).
E. The cation is positively charged.
(a)
space 1 =__________are chemically neutral while_______ are charged particles.
(a)
Atoms are chemically neutral while (a) are charged particles.
What is the molar mass of AuCl3?
(a)
Why does the mole (the number 6.02 x 1023) need to be so big.
atoms and molecules are so small
the number needs to be in scientific notation
scientists prefer complicated numbers
3.14 was already taken by mathematicians
Which contains the most atoms?
1 mol C
1 mol S
1 mol Al
Each jar contains the same number of atoms
The molar mass of copper phosphate, Cu3(PO4)2 is (a) .
The table below shows the pH values of samples of substances.
According to the table, which of these substances is basic?
drain cleaner
distilled water
soda water
rain water
The correct name for an aqueous solution of HCl is____________ ________
(a)
How much more acidic is a solution with a pH of 4 than a solution with a pH of 8?
100
10
4
10,000
Considering your knowledge of chemistry, select all of the substances that would be acidic.
HCl
HNO3
NaOH
Sr(OH)2
H2SO4
Which pair of atoms will share electrons when a bond is formed between them?
K and Cl
Li and I
Br and Cl
Ba and F
What type of bonds are formed when metal atoms combine with nonmetal atoms?
non-polar covalent bonds
polar covalent bonds
ionic bonds
metallic bonds
What is the correct formula for sodium carbonate?
MgO
SiO2
Na2CO3
NO
What is the correct formula for nitrogen monoxide?
MgO
SiO2
Na2CO3
NO
What is the correct formula for silicon dioxide?
MgO
SiO2
Na2CO3
NO
What is the correct formula for magnesium oxide?
MgO
SiO2
Na2CO3
NO
Which pair of water molecules shown below are most likely to form a hydrogen bond in their current positions?
I
II
III
All are
Match the substance with the correct description:
sodium iodide
one electron is transferred resulting in an an electrostatic attraction between a metal and a nonmetal.
contains a polyatomic ion
electrons are shared between two nonmetals
its name is sulfur dioxide
Match the substance with the correct description:
Mg(NO3)2
one electron is transferred resulting in an an electrostatic attraction between a metal and a nonmetal.
contains a polyatomic ion
electrons are shared between two nonmetals
its name is sulfur dioxide
Match the substance with the correct description:
SO2
one electron is transferred resulting in an an electrostatic attraction between a metal and a nonmetal.
contains a polyatomic ion
electrons are shared between two nonmetals
its name is sulfur dioxide
Match the substance with the correct description:
PCl3
one electron is transferred resulting in an an electrostatic attraction between a metal and a nonmetal.
contains a polyatomic ion
electrons are shared between two nonmetals
its name is sulfur dioxide
What does this image represent?
an atom
an element
a molecule
delicious Jawbreakers
Based on what you see in the photowhich substance has the greatest density?
diet coke
coca cola classic
water
The picture below represents what?
2-atom compound
mixture of two elements
mixture of two compounds
molecules
In order to get the molecules to evaporate, a scientist would have to add
molecules
atoms
chemistry
energy
Matter includes all of the following EXCEPT
air
light
smoke
water vapor
The diagramshows diatomic molecules. An example would be________
Ca
S
O
triatomic
1
2
3
4
Sodium catches fire when it comes into contact with water.
It is a chemical reaction because (check all that apply):
There is a color change
There is a temperature change
Smoke (gas) is given off
The water went from a neutral pH to a basic pH level
What coefficient would go in the blank to balance the equation correctly?
2 MgI2 + Mn(SO3)2 →___MgSO3 + MnI4
no coefficient needed
2
5
6
Match the following reactions to the correct reaction type
KI + Pb(NO3)2 → PbI2 + KNO3
decomposition
double replacement
acid/base neutralization
synthesis
combustion
Match the following reactions to the correct reaction type
C + O2 → CO2
decomposition
single replacement
acid/base neutralization
synthesis
combustion
Match the following reactions to the correct reaction type
H3PO4 + KOH → K3PO4 + H2O
decomposition
single replacement
acid/base neutralization
synthesis
combustion
Match the following reactions to the correct reaction type
C3H8 + 5 O2 → 3 CO2 + 4 H2O
decomposition
single replacement
acid/base neutralization
synthesis
combustion
Match the following reactions to the correct reaction type
Zn + CuCl2 → ZnCl2 + Cu
decomposition
single replacement
acid/base neutralization
synthesis
combustion
Match the following reactions to the correct reaction type
2 KClO3 → 2 KCl + 3 O2
decomposition
single replacement
acid/base neutralization
synthesis
combustion
During the reaction demo 2KClO3(s) → 2KCl(s) + 3O2(g). I used catalysts. What is the role of a catalyst during a chemical reaction.
as a reactant
as a product
to be used up
to speed it up
When the equation Fe3O4 + Al --> Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?
3
4
6
9
Which is the true statement about chemical reactions?
Matter can not be created but it can be destroyed.
Sublimation is a chemical change.
When water is boiled, covalent bonds are broken.
Matter cannot be created nor destroyed.
You didn't finish your lunch and have 15 minutes before your lab results will be ready. This will be a good time to finish your lunch.
True
False
What should be the very last function performed in the lab before you leave?
Say goodbye to the instructor
Make sure that your lab area is clean
Wash your hands
Arrange a time with your lab partner for lunch
Which is the correct procedure for smelling a chemical?
Point vessel away form face while gently wafting vapors toward nose
You should never smell a chemical
Smell a chemical as you would anything else
Stick your nose lose to the vessel and breath deeply
Appropriate lab attire includes (choose all that apply):
aprons
closed toed shoes
long loose hair
high heels
goggles
What category of elements does an element belong if it is a poor conductor of electricity?
transition elements
metalloids
metals
nonmetals
In the alkalii metal group, the atom with the smallest radius is____.
Li
Fr
Na
Cs
How will a hammer test tell us information about an unknown substance and whether it is metallic or not?
Metals are usually brittle (they break easily)
Metals are usually malleable (they can be hammered into thin sheets without breaking)
The more stress released from hammering a sample, the more metallic it is.
If the hammer makes a “tinging” sound, the sample is more likely to be a metal than a nonmetal.
A substance in the lab has the following characteristics:
appears shiny
is silver in color
is malleable
has a high electrical conductivity
The substance is most likeyly which element?
H
Ni
S
I
As you move from top to bottom on the peroiodic table, why does electrotronegativity decrease?
Because the outermost electrons get further from the atoms nucleus causing the attraction between nucleus and valance electrons to increase.
Because the outermost electrons get closer to the atoms nucleus causing the attraction between nucleus and valance electrons to increase.
Because the outermost electrons get closer to the atoms nucleus causing the attraction between nucleus and valance electrons to decrease.
Because the outermost electrons get further from the atoms nucleus causing the attraction between nucleus and valance electrons to decrease.
The homogeneous mixture in the illustration is in container____.
a
b
c
d
When salt is dissolved into water, salt is the _______
solute
solvent
solution
mole
When salt is dissolved into water, water is the _______
solute
solvent
solution
mole
Match the picture to the name of its physical state.
gas
liquid
solid
plasma
Match the picture to the name of its physical state.
gas
liquid
solid
plasma
Match the picture to the name of its physical state.
gas
liquid
solid
plasma
Match the picture to the name of its physical state.
gas
liquid
solid
plasma
Which of the substances listed below are mixtures? Select all that apply.
coffee
air
water
copper
sand
Match the picture to the type of mixture that it is.
A heterogenous mixture of compounds and elements.
A homogeneous mixture of compounds.
A heterogenous mixture of compounds.
A homogenous mixture of compounds and elements.
Match the picture to the type of mixture that it is.
A heterogenous mixture of compounds and elements.
A homogeneous mixture of compounds.
A heterogenous mixture of compounds.
A homogenous mixture of compounds and elements.
Match the picture to the type of mixture that it is.
A heterogenous mixture of compounds and elements.
A homogeneous mixture of compounds.
A heterogenous mixture of compounds.
A homogenous mixture of compounds and elements.
Match the picture to the type of mixture that it is.
A heterogenous mixture of compounds and elements.
A homogeneous mixture of compounds.
A heterogenous mixture of compounds.
A homogenous mixture of compounds and elements.
