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WorksheetsChemistry Final Practice
Total questions: 132
Worksheet time: 1hrs 6mins
If you are in lab and have longer hair, what should you do with it?
Nothing its only a problem with fire
Shake it out before proceeding
Put on a hat
Keep all long hair pulled back and tied
What kind of clothes should you not wear in a science lab?
Loose clothing- especially sleeves!
Close toed shoes
Jeans
Lab coat
What do you do if your lab partner catches on fire?
Wrap them in the fire blanket and pat them!
Dance around them screaming
Move far away as possible so you don't catch on fire
Don't tell anyone
How do you protect your eyes during labs?
Wear eye protection (goggles)
Close your eyes around chemicals
If you have contacts or glasses you don't have to worry
How do you smell chemicals in Chemistry lab?
Hold the vial way far away from your face and hope the smell doesn't get to you.
Hold the vial under your nose and breathe in deeply to make sure you get a good sense of what it smells like
Hold the vial under your nose and waft it
Hold the vial under your nose and breathe in normally
When heating or mixing a test tube, what must you remember?
Neve hold a test tube over an open flame
Directly mix the tube towards you so you can see it clearly
Angle it away from you and your partner’s faces
Add as much as you can so you can get the biggest chemical reaction
How should you behave for safety during labs?
PAY ATTENTION to directions- “Lab Defensively”
Running around with lab equipment
Leave your open flame unattended
Eat food to keep up your energy
What is a beaker used for in a lab?
Used for holding liquids as it is not precise in measuring
Used to correctly measure liquids
Used to measure temperature
Used to mix precise reactants fora chemical reaction
What is the purpose of the background in the scientific method?
Background is where you include prior knowledge or research for your investigation
Background is where you include all your data from your investigation
Background includes material list for procedure
Background is where you analyze data in graphs
What should be included in a research question or problem statement to make it testable?
A prediction about results
All your data and findings from your investigation
Both responding and manipulated variables
Background research
What is a hypothesis and what do you need to include?
a brief description of what you are testing, what you predict will happen and the reasoning for your prediction
a detailed list of steps you will perform in the experiment
a random guess about the results
an educated prediction of the results
What should procedures include?
Directions how to collect data
Logical steps to be followed to test the question, with all materials and amounts included
The basic steps without any specifics to confuse
Predictions about data results
What are some forms of analysis of data?
Errors and improvements in data
Pictures and descriptions
Real world application of results
Graphs, calculations, and reflective questions about the data.
What is the SI metric unit for Energy?
Joules (J)
Degrees Celsius (C)
Calories (Cal)
Kelvin (K)
In the metric system, what does the prefix Kilo mean?
1/100
1/1000
100
1000
In Scientific notation, how does writing really large numbers differ from writing really small (decimal) numbers?
Large Numbers have positive exponents and decimal numbers have negative exponents.
Large numbers are longer than decimal numbers
Large numbers increase and small numbers decrease
Large numbers have to be written before smaller numbers
How are metric conversions set up?
using dimensional analysis or factor label method to cancel units until desired unit is achieved.
as quickly as possible to find answer
with the biggest number on top
using common units to cross multiply
What is the volume of a substance?
The sound that it makes
The level of a liquid measured in a graduated cylinder
The amount of matter in a substance
The amount of space a substance occupies
What is the mass of a substance?
The sound that it makes
The level of a liquid measured in a graduated cylinder
The amount of matter in a substance
The amount of space a substance occupies
What is the correct unit for measuring density?
mL/g
g/mL
grams
mL
Which of the following is a chemical property?
The mass of the apple is 198 grams
Iron will rust in the presence of Oxygen
The grass is green and brown in color
The liquid is thick and clear
What are qualitative observations?
Observations made of how something behaves or appears
Observations made measuring data carefully
Observations made by recording what you see
Observations made using inferences
What is matter?
Anything that can be observed with the 5 senses
Everything that can be found in the universe
Anything that has mass and volume
Anything that has mass
What is a graduated cylinder?
What are atoms made of?
Protons and electrons
Protons and neutrons
Protons, neutrons, and electrons
Protons only
Which subatomic particle weighs the least?
Protons
Electrons
Neutrons
Nucleus
What charge do protons carry?
Positive
Negative
Neutral
Even
What charge do electrons carry?
Positive
Negative
Neutral
Even
What charge do neutrons carry?
Positive
Negative
Neutral
Even
What particles are found in an atom’s nucleus?
Protons and neutrons
Protons and electrons
Protons only
Neutrons only
What is the primary way the periodic table is organized?
By increasing atomic mass
By increasing proton number
By increasing electronegativities
By increasing atomic size
In the periodic table, what does the period/row tell us?
What ion an atom will form
How heavy it will probably be
How many energy levels it has
What properties it has
In the periodic table, what does the group/family tell us?
What ion an atom will form
How many valence electrons in has
What chemical properties it might have
All of the Above
What are valence electrons?
Electrons found in the outermost energy level
Electrons found closest to the nucleus
Electrons with a positive charge
All of the Above
What is electronegativity?
The distance from the center of the nucleus to the last energy level
How much energy it takes to remove an electron from an atom
The amount of attraction an atom has to pull an electron to itself
The number of electrons an atom contains
What is ionization energy?
The distance from the center of the nucleus to the last energy level
How much energy it takes to remove an electron from an atom
The amount of attraction an atom has to pull an electron to itself
The number of electrons an atom contains
What is increasing trend of electronegativity?
It increases across the P Table from left to right and up the groups
It increases across the P Table from left to right and down the groups
It increases across the P Table from right to left and up the groups
It increases across the P Table from right to left and down the groups
What is increasing trend of atomic radius?
It increases across the P Table from left to right and up the groups
It increases across the P Table from left to right and down the groups
It increases across the P Table from right to left and up the groups
It increases across the P Table from right to left and down the groups
Where are metals found on the periodic table?
On the right side of the stair step line
Touching the stair step line
On the left side of the stair step line
Only in the very middle section
Which of the following elements exists only as a diatomic molecule in pure form?
Carbon
Neon
Sodium
Oxygen
How many Hydrogen atoms are in the following compound? Compound: NH4C2H3O2
4
7
3
8
How many Oxygen atoms are in the following compound? Compound: Fe2(Cr2O7)3
3
7
10
21
What is the amount of particles found in a mole?
6.02 X 1023 particles
3.01 X 1023 particles
1 particle
60.2 X 1023 particles
What type of elements form ionic bonds?
Metals and nonmetals
Metals and metals
Nonmetals and nonmetals
Ions with ions
What type of elements form covalent bonds?
Metals and nonmetals
Metals and metals
Nonmetals and nonmetals
Ions with ions
Which of the following characteristics describe metallic compounds?
Conducts electricity
Conducts heat
Malleable and Ductile
All of the Above
What charge do cations have?
positive
negative
both
none of the above
What is the molar mass of CO2?
12 grams
44 grams
32 grams
6.02 X 1023
Which bond type has the greatest differences in electronegativities?(>1.8)
ionic bond
covalent bond
metallic bond
hydrogen bond
Which of the following compounds is named Iron (II) sulfate?
FeS4
FeSO4
Fe(OH)2
FeCO3
Water is a _______ molecule.
nonpolar
ionic
polar
network covalent
Conductivity is the ability to
transfer heat or electrons through as substance
prevent heat or electrons to transfer through a substance
absorb heat or electrons into a substance
emit heat or electrons from a substance
Which of the following compounds will dissolve in water?
Polar Compounds
Ionic Compounds
Nonpolar Compounds
Both A and B
Which of the following reactions reflects a balanced equation?
2Na + 2H2O ---> 2NaOH + H2
Na2O2 + H2O ---> 2NaOH + O2
2Zn + HCl ---> ZnCl2 + H2
2KClO3 ---> KCl + 3O2
What is a precipitate?
When a liquid and a solid react to form a gas
The process where molecules separate depending on size and polarity
When a solute completely dissolves in water to form a liquid solution
A solid that forms when two aqueous solutions react to form a product that is not soluble in water
What is an aqueous solution?
When a liquid and a solid react to form a gas
The process where molecules separate depending on size and mass
When a solute completely dissolves in water
A solid forming when two aqueous solutions react to form a product that is not soluble in water
What is Kinetic Energy?
The energy of an object in motion
The energy stored within a substance
The energy released as heat
The energy of the universe
What is Potential Energy?
The energy of an object in motion
The energy stored within a substance
The energy released as heat
The energy of the universe
In an endothermic reaction,
heat is absorbed by the reaction
heat is released by the reaction
heat is in equilibrium
heat is not a factor in this type of reaction
When bonds are formed,
energy is absorbed
energy is released
energy is in equilibrium
energy is not a factor in this process
When bonds are broken,
energy is absorbed
energy is released
energy is in equilibrium
energy is not a factor in this process
In order to change phases of matter, one must
Move the object
Change the energy of the system
Calculate it’s mass and volume
Do nothing, it will occur naturally
What would not be included in a conclusion?
claim, evidence and reasoning for what happened in the lab
real world application
graph of data
new questions for future investigation
errors in data collection
What are properties of a liquid?
Definite shape and definite volume
No definite shape but definite volume
No definite shape or volume
Electrons flying around removed from atoms.
The average atomic mass of an element as shown on the periodic table is determined by
The number of isotopes of the element only.
The percent abundance of each isotope only.
The mass of each isotope only.
All of the above are used to determine the average atomic mass.
Which of the following represents a chemical change?
Dissolving salt in water.
Boiling water for tea.
Burning a piece of paper.
Melting an ice cube.
The smallest form of matter that still holds its original properties is called a(n)
ion
proton
quark
atom
Noble gases are unreactive because
they are gases so other atoms can't find them.
they have too high of electronegativities.
they have a full outer energy level of electrons.
they have all the protons they need to be stable.
The “Octet rule” says that atoms are more stable when they have...
An atomic number that ends in eight
Eight protons in the outer energy level
Eight electrons in the outer energy level
Eighty electrons total
What is an ion?
A type of bond
A charged particle
An atom that can never be found alone
A molecule composed of 2 atoms.
Which of the following best describes covalent bonding?
The sharing of one or more pairs of electrons between two atoms.
The transfer of one or more electron causing oppositely charged particles to attract.
Delocalized electrons that free flow around cations.
The sharing of one or more protons between two atoms.
If you dissolved 10g of salt into water, the salt would be called the…
Solvent
Solute
Solution
Catalyst
In a chemical equation, the reactants belong…
On the left side of the equation, with products on the right
On the right side of the equation, with products on the left
Over the arrow to show that they are not used up in the reaction
The reactants are not included in the chemical equations
By rule in stoichiometry, you must always start with:
Grams of a known substance
The theoretical yield
The moles of your product
A balanced equation
In an exothermic reaction,
heat is absorbed by the reaction
heat is released by the reaction
heat is in equilibrium
heat is not a factor in this type of reaction
Classify the following reaction:
CH4 + 2O2 → CO2 + 2H2O
Combination
Single Displacement
Double Displacement
Combustion
Decomposition
Classifying the following reaction:
2H2O → 2H2 + O2
Combination
Single Displacement
Double Displacement
Combustion
Decomposition
Classify the following reaction:
Zn + 2HCl → H2 + ZnCl2
Combination
Single Displacement
Double Displacement
Combustion
Decomposition
Classify the following type of reaction:
2KCl + 3O2→ 2KClO3
Combination
Single Displacement
Double Displacement
Combustion
Decomposition
Classify the following reaction:
H2SO4 + 2NaOH → Na2SO4 + 2H2O
Combination
Single Displacement
Double Displacement
Combustion
Decomposition
Which of the following represents a physical change?
Melting of ice
Burning of wood
Rusting of nail
Rotting of fruit
What are properties of a solid?
Definite shape and definite volume
No definite shape but definite volume
No definite shape or volume
Electrons flying around removed from atoms.
What is the correct reading for the volume of water in the graduated cylinder shown in the picture below?
43 ml
43.5 ml
44 ml
45 ml
How many bonds does a carbon atom often form in a covalent compound?
1
2
3
4
How many bonds does a nitrogen atom often form in a covalent compound?
1
2
3
4
Which of the structural formulas below could exist according to the HONC 1234 rule?
What must happen to a solid material before a person is able to smell it?
Molecules break apart into individual functional groups.
Molecules melt to the liquid state.
Molecules vaporize to the gas state.
Molecules clump together in the air.
What structural component results in a fishy smell?
long chain structure with carbon, hydrogen and oxygen
carboxyl functional group
nitrogen in molecular formula
frying pan structure with carbon, hydrogen and oxygen
ball structure with carbon, hydrogen and oxygen
What structural component results in a putrid smell?
long chain structure with carbon, hydrogen and oxygen
nitrogen in molecular formula
carboxyl functional group
ball structure with carbon, hydrogen and oxygen
frying pan structure with carbon, hydrogen and oxygen
What structural component results in sweet smell?
long chain structure with carbon, hydrogen and oxygen
frying pan structure with carbon, hydrogen and oxygen
nitrogen in molecular formula
carboxyl functional group
ball structure with carbon, hydrogen and oxygen
What structural component results in minty smell?
long chain structure with carbon, hydrogen and oxygen
frying pan structure with carbon, hydrogen and oxygen
nitrogen in molecular formula
carboxyl functional group
ball structure with carbon, hydrogen and oxygen
What structural component results in camphor smell?
long chain structure with carbon, hydrogen and oxygen
frying pan structure with carbon, hydrogen and oxygen
nitrogen in molecular formula
carboxyl functional group
ball structure with carbon, hydrogen and oxygen
What is the correct interpretation of this reaction?
Cu(s) + 2HCl(aq) → CuCl2(aq) + H2(g)
Hydrogen gas reacts with a solution of copper chloride to produce solid copper metal in a solution of hydrochloric acid.
A solution of copper metal reacts with solid hydrochloric acid to produce a solution of copper chloride and hydrogen gas.
Hydrogen gas reacts with solid copper chloride to produce solid copper metal in a solution of hydrochloric acid.
Solid copper reacts with a solution of hydrochloric acid to produce a solution of copper chloride and hydrogen gas.
H2O(s) → H2O(g) is an example of _____.
a combination reaction
a decomposition reaction
a physical change
a chemical change
Suppose you mixed solid calcium metal, Ca with hydrochloric acid, HCl(aq) in an open container. If the mass of the reactants were measured and then the mass of the products in the container were measured after the reaction has completed, what would be the result?
Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)
The mass will stay the same.
The mass will increase.
The mass will decrease.
There is not enough information to answer the question.
Jake measures the weight of one bottle cap as 5.35 grams, so he calculates that the weight of 100 bottle caps will be 535 grams. The actual weight of 100 bottle caps is 518 grams. What is Jake’s percent error?
9.7%
3.2%
1.6%
0.032%
What are quantitative observations?
observation about how something appears or behaves
observations that include numbers
observations made from smelling a substance
observations about color changes that take place
Elements in group 1A on the periodic table are known as
noble gases
halogens
alkali metals
alkaline earth metals
Elements in group 7A are known as
halogens
noble gases
alkali metals
alkaline earth metals
Elements in group 1-8B are known as
noble gases
alkaline earth metals
halogens
transition metals
Elements in group 2A are known as
halogens
noble gases
alkaline earth metals
transition metals
Elements in group 8A are known as
halogens
alkaline earth metals
noble gases
alkali metals
If you have 1 mol of aluminum, 1 mol of iron, 1 mol of zinc, and 1 mol of tin, which has the most mass?
aluminum
iron
zinc
tin
Which contains the most atoms: 20 g of aluminum, 20 g of iron, 20 g of zinc, or 20 g of tin?
Aluminum
Iron
Zinc
Tin
How can you convert the mass of a substance to moles?
Divide the mass of the substance in grams by its molar mass.
Divide the molar mass of the substance by the mass of the substance in grams.
Multiply the molar mass of the substance by the mass of the substance in grams.
Multiply the mass of the substance in grams by its molar mass.
How many moles of phosphorus trichloride, PCl3 molecules are there in an 80.0 gram sample?
0.085 mol
0.583 mol
1.72 mol
137.5 mol
How many atoms are there in 1 mole of SO2?
6.02 × 1023 atoms
1.80 × 1024 atoms
6.02 × 1024 atoms
1.80 × 1069 atoms
Which of the following will increase the rate of reaction between a solid and a solution?
Increase the size of the solid particles.
Add water to the solution.
Heat the mixture.
Let mixture sit undisturbed.
What happens when you add a catalyst to a chemical reaction?
The activation energy goes up.
The catalyst reacts to form a new compound.
The activation energy goes down.
The catalyst is consumed.
Which scientist created the modern periodic table?
Niels Bohr
John Dalton
Ernest Rutherford
Dmitri Mendeleev
JJ. Thomson
Which scientist discovered the electron?
Niels Bohr
John Dalton
Ernest Rutherford
Dmitri Mendeleev
JJ Thomson
Which scientist created a model of the atom with electron orbiting the nucleus like planets orbit the sun?
Niels Bohr
John Dalton
Dmitri Mendeleev
Ernest Rutherford
JJ Thomson
Which scientist came up with the first atomic theory with four parts?
Niels Bohr
John Dalton
Ernest Rutherford
Dmitri Mendeleev
JJ Thomson
Which scientist discovered the nucleus of an atom?
Niels Bohr
John Dalton
Ernest Rutherford
Dmitri Mendeleev
JJ Thomson
What is the transition from solid to gas called?
Sublimation
Melting
Vaporization
Condensation
Freezing
What is the transition from solid to liquid called?
Sublimation
Freezing
Melting
Vaporization
Deposition
What is the transition from liquid to gas called?
Sublimation
Freezing
Vaporization
Melting
Condensation
What is the transition from gas to liquid called?
Sublimation
Freezing
Melting
Vaporization
Condensation
What is the transition from liquid to solid called?
Sublimation
Freezing
Condensation
Vaporization
Melting
Which statement below is true based on the second law of thermodynamics?
Energy is transferred from colder to hotter objects during an endothermic process.
Energy is transferred from colder to hotter objects during an exothermic process.
Energy is never transferred during a chemical process.
Energy is always transferred from hotter to colder objects.
How much energy is required to raise the temperature of 55 g of iron (Cp = 0.11 cal/g°C) from 42 °C to 71 °C?
175 cal
500 cal
5.5 cal
254 cal
If you have 2 moles of glucose in 4 L of solution, what is the concentration of the solution?
0.5 M
2 M
4 M
8 M
Which unit should be used for solution concentration?
J/g
L/mol
mol/L
mol2/L•s
How can milliliters (mL) be converted into liters (L)?
multiply mL by 1000
divide mL by 1000
multiply mL by 100
divide mL by 100
According to this balanced equation, how many moles of Cu(NO3)3 are required to produce 24 mol of Al?
3Cu(s) + 2Al(NO3)3(aq) → 2Al(s) + 3Cu(NO3)2(aq)
20
36
48
60
What is an isotope?
two substances with the same molecular formula but different structures
an atom of the same element but with a different number of neutrons so its mass is different
similar elements in the same family
substances that are the same colors
What is a lone pair on an atom?
a single electron
a pair of protons
a pair of electrons not bonded to another atom
a pair of electrons bonded to only one other atom
What is theoretical yield?
the formulas for the products in a reaction
amount of water mixed with the products
the expected amount of product in grams that will form at the end of a reaction
the limiting reactant
What is the Law of Conservation of Mass?
Mass of reactants stays the same
Mass changes throughout a reaction
Mass is created in a reaction to make new products
The total mass of a system is always conserved
What is a limiting reactant?
The reactant that runs out and limits how much product you can make
The reactant that stops reaction from starting
The reactant that speeds up a chemical reaction
The reactant that slows down a chemical reaction
What does Calorimetry measure?
amount of energy found in a substance measured by the amount of heat that is absorbed by water as the substance is burned
amount of color stored in a substance that creates color you see
the temperature that water changes when heated
the amount of water needed to heat burning food
How many valence electrons does oxygen have?
2
4
6
8
