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Worksheets2022 Chemistry Final Exam Reg
Total questions: 103
Worksheet time: 2hrs 58mins
Which substance represents an ionic compound?
H2O2 (hydrogen peroxide)
NaCl (salt)
H2O (water)
CO (carbon moxide)
The difference between a compound and a mixture.
A compound can be separated into elements
A compound can be separated into impure substances
A mixture can not be separated
A mixture can be physically separated
Which of the elements in the periodic table above should have the smallest atomic radius?
Potassium (K)
Scandium (Sc)
Rubidium (Rb)
Cesium (Cs)
What are the rules for writing the abbreviation for an element?
The first and second letter are both capitalizes
The first letter is always capitalized
The second letter is always lower case
There isn't a rule, you just look at the periodic table
How many atoms of Sulfur are in the following compound:
Al2(SO4)3
12
4
3
1
Which one identifies an atom and the correct number of valence electrons?
Magnesium (Mg) - 1 valence electron
Nitrogen (N)- 4 valence electrons
Chlorine (Cl)- 7 valence electrons
Iodine (I)- 8 valence electrons
In the element Nitrogen, how many electrons are available for bonding?
2
3
4
5
Which statements are true of the nucleus of an atom?
It contains all the subatomic particles
It contains protons and neutrons
It contains almost all the mass
It has a positive charge
It has a negative charge
Mark all that are true about electrons
They have a negative charge
They orbit the nuclues
They are involved in bonding
They have a positive charge
They make up the mass of an atom
Which group of the periodic table are noble gases found?
Group 1
Group 10
Group 12
Group 18
Which of the following is not organized in a column in the periodic table?
Which is not a group or family?
Noble gases
Alkali metals
Metalloids
Halogens
What are the physical properties of a metal?
Mark all that apply
They are shiny
They conduct electricity
They react with acids
They are brittle
They are dull
Which of the following describes a precipitate?
a new liquid forms when a solid reactant is heated and melts
a new solid product formed from two aqueous reactants
a new gas forms when a solid is dissolved in a liquid
bubbles form when two aqueous reactants are mixed
a new solid forms when an aqueous reactant freezes
All of the following are indicators of a chemical reaction except one. Which one is NOT an indicator that a chemical reaction has taken place?
the production of heat or light
a color change
the production of gas bubbles
the dissolving of one substance in another
an odor change
Examine the chemical equation. Check the box(es) below of the particular indicator(s) present in the equation.
AgNO3 (aq) + NaCl (aq) --> AgCl (s) + NaNO3 (aq)
formation of water
formation of a gas
formation of a precipitate
color change
energy change
Examine the chemical equation. Check the box(es) below of the particular indicator(s) present in the equation.
Na2CO3 (s) + HCl (aq) --> H2O (g) + NaCl (aq) + CO2 (g)
formation of water
formation of a gas
formation of a precipitate
color change
Four students performed four different investigations by combining different substances. Which of the observations is most indicative of a chemical reaction?
investigation 1
investigation 2
investigation 3
investigation 4
An aqueous, cloudy, white baking soda solution was combined with solid, powdery, white calcium chloride. Once combined, the temperature of the test tube increased and bubbling occurred creating an aqueous, cloudy, white solution with a flaky, white solid. What indicators of a chemical change are present?
energy change
Color change
gas bubbling
precipitate formation
What is Ca3N2 called?
calcium nitride
calcium (II) nitride
calcium nitrogen
tricalcium dinitride
The chemical bond between a non-metal and another non-metal will be a ________ bond.
metal
ionic
covalent
polar
The chemical bond between a metal and a non-metal will be a _____ bond.
metal
ionic
covalent
polar
Beryllium and sulfur will form a ______ bond
ionic
covalent
metalloid
Sodium and Bromine will make a _____ bond.
ionic
covalent
metallic
Carbon and Oxygen will make a ___________ bond.
ionic
covalent
metallic
What is the left part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Yields
Products
Chemical equation
What is the right part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Yields
Products
Chemical Equation
What is the total number of atoms present in 5Na3PO4?
5
55
40
8
How many Mn atoms are found in the following compound?
2MnO4
1
2
4
8
What is the little number after an element in a chemical equation called?
Example: H2
Coefficient
Atom
Subscript
Equation
What is the number before a chemical formula called?
Example: 2H2 + O2 ---> 2H2O
Coefficient
Atom
Subscript
Equation
Which of the following equations are correctly balanced?
12CO2 + H2O ---> C6H12O6 + O2
CO2 + H2O ---> 3C6H12O6 + O2
CO2 + 9H2O ---> C6H12O6 + O2
6CO2 + 6H2O ---> C6H12O6 + 6O2
Which of the pictures below shows a balanced representation of
H2 + O2 → H2O?
What law governs the balancing of chemical equations?
Law of Energy
Law of Conservation of Matter/Mass
Law of Gravity
Law of Matter Movement
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
What are the coefficients that would properly balance this equation?
__Ca + __H2O --> __Ca(OH)2 + __H2
2,1 --> 2,1
1,2 --> 1,1
1,2 --> 2,4
1,2 --> 2,1
What are the coefficients that would properly balance this equation?
__AgNO3 + __H2S --> __Ag2S+ __HNO3
2,1 --> 1,2
1,2 --> 1,1
1,2 --> 1,2
1,2 --> 2,1
What are the coefficients that would properly balance this equation?
__Al + __O2--> __Al2O3
4,1 --> 2
4,3 --> 4
3,4 --> 1
4,3 --> 2
In an endothermic reaction, heat is ...
taken in
given out
Bond making is
Endothermic
Exothermic
Bond breaking is..
Endothermic
Exothermic
Is this showing an endothermic or an exothermic reaction?
Endothermic
Exothermic
Which letter shows the heat change?
A
B
C
D
E
Which letter represents the reactants?
A
B
C
D
E
Which letter represents the products?
A
B
C
D
E
What is the Heat of Reaction ΔH for this reaction?
-200 KJ
200 KJ
400 KJ
-300 KJ
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.
0.46 J/goC
1.654 J/goC
2,567,446.875 J/goC
How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22.0°C to 55.0°C, if the specific heat of aluminum is 0.903 J/g°C?
298 Joules
0.003 Joules
297 J/g°C
0.003 J/g°C
A 300.0 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 0.3845 J/g 0C, what is the change of the copper's temperature?
641 °C
7,650,000 Joules
-50°
-100°
50°
The specific heat of aluminum is 0.9025 J/g°C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°?
451 J
45.1 J
400 J
20.0 g of water. specific heat of water is 4.184 J/g°C. temperature changes from 25.0° C to 20.0° C, how much heat energy (Q) moves from the water to the surroundings?
418 Joules
209 J
83 J
4.18 J
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
How many grams are in 7.8 moles of NaCl?
476 grams
460 grams
452 grams
462 grams
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
How many moles of oxygen are consumed if 8 moles H2 are used?
2Al + 6HCl --> 2AlCl3 + 3H2
Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?
13
8.8
0.99
1.0
Mg3N2 + 3H2O ––> 3 MgO + 2NH3
If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?
4.9 L NH3
4.96 L NH3
0.261 L NH3
0.26 L NH3
1Mg + 2H2O --> Mg(OH)2 + H2
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?
62.0 L
0.12 L
2.77 L
1.15 L
Br2 (l) + KI (aq) →
Ni (s) + H2O (l) →
Au (s) + HCl (l) →
Predict the product(s) of this reaction (don't worry about balancing):
Li + H2O →
Li2O + H2
LiO + H2
LiOH + H2
Li(OH)2
Pb(NO3)2 + KI →
Li + NaF ->
Oxidation is the _________ of electrons.
loss
gain
sharing
transfer
Reduction is the ___________ of electrons.
loss
gain
sharing
transfer
Mg → Mg2+ + 2e–
In a reaction, copper is reduced; its number of electrons has:
Increased
Decreased
Remained Constant
Varies Randomly
A wave with a large wavelength will have a ______ frequency and _____ energy
high, low
high, high
low, high
low, low
What is the speed of light?
3.0x108 ms
3.0x108 m/s
6.626x10-34 Js
6.626x10-34 J/s
The frequency of violet light is 7.5x1014 Hz. What is its wavelength?
4.0x10-7 m
4.0x107 m
2.25x1023m
2.25x1023 Hz
What is the value of Planck's Constant?
(a)
A blue light has a wavelength of 4x10^-7 m. What is its frequency, to one decimal place?
(a)
When an electric stove glows red, it is producing near-IR light, of wavelength about 7.9x10^-7 m. What is its frequency to 3 decimal places?
(a)
A blacklight that makes neon things glow in the dark has a wavelength of about 3.15x10^-7 m. What is its frequency? (2 decimal places please!)
(a)
A soda bottle is about 13 inches tall, or 3.3x10^-1 m. An electromagnetic wave of the same wavelength would be what type of wave?
Radio wave
Micro wave
Visible light
X-ray
A certain wave has a frequency of 2.68 x 10^6 Hz. How much energy does it have? (1 decimal places please.)
(a)
PET scans for medical imaging usually involve a small amount of radioactive decay, producing a gamma ray of about 1.24x10^20 Hz. How much energy does this radiation have? (3 decimal places please!)
(a)
