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WorksheetsChemistry Final Exam Review 2023
Total questions: 110
Worksheet time: 2hrs 21mins
Which particles are responsible for creating chemical bonds between atoms? (a)
An atom's valence electrons are located where? (a)
Which particles are responsible for preventing the protons of an atom's nucleus from repelling each other and flying into space? (a)
How many bonds can Nitrogen make?
What is the mass of the Chlorine gas?
2NaCl + F2 ➜ 2NaF + Cl2
(a) g
Which characteristics describe an acid? (a)
Which characteristics describe a base?
tastes sour, Has a pH lower than 7
tastes bitter, Has a pH greater than 7
tastes bitter sour, lHas a pH of 7
tastes bitter sour, Has no pH
HCl reacts with Zn giving off heat. This reaction must be (a) .
Energy in fuel is stored where in the molecules?
Protons
Electrons
Bonds
Light
Increasing temperature has what effect on reaction rate?
No effect
Increasing temperature lowers reaction rate
Increasing temperature increases reaction rate
What are you talking about?
Balance the following equation.
__Na + __Cl2 --> __NaCl
1,1,2
2,1,2
2,1,1
already balanced
Which type of reaction is:
2 NH3 + H2SO4 → (NH4)2SO4
The two sides of a chemical equation are called?
Reactants (left) and Products (right)
Ingredients (left) and Product (right)
Cations and Anions
Reactants (left) and Results (right)
How many HCl molecules do you need to balance this equation?
Mg + (a) HCl ---> MgCl2 + H2
What are the columns referred to on the Periodic Table of Elements?
Families or groups
Periods
Elements on the Periodic Table of the Elements are classified into categories such as
rocks and minerals
molecules and atoms
metals and nonmetals
The majority (most) of the elements are:
metals
nonmetals
metalloids
What is formula when calcium and chlorine combine?
CaCl
CaCl2
ClClO3
CaC2
An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?
0
7
6
13
What type of bond is formed when atoms share electrons?
Covalent
Ionic
Hydrogen
Polyatomic
A substance with a pH of 8 is a
acid
base
neutral
Carbon has 4 valence electrons which means
it can only form bonds with carbon
it is stable
it can make ionic bonds
it wants to make 4 covalent bonds
Acids have more ______ ions than bases
OH-
H-
OH+
H+
The atomic number of oxygen is
8
15.9994
16
O
The molar volume of a gas at STP occupies _____________.
22.4 L
0˚C
1 kiloPascal
12 grams
If 2.00 L of a gas in a container at room temperature exerts a pressure of 4.00 atm. If the pressure doubles and the temperature remains the same, the volume would become ________.
16.0 L
2.00 L
4.00 L
1.00 L
If 7.00 grams of nitrogen gas are contained in a 5.00 L flask at 4.62 kPa. What is the temperature of the gas?
11.1 K
1.00 K
4.12 K
9.07 K
Chemical equations must be balanced to satisfy ____.
The law of definite proportions
The law of multiple proportions
The law of conservation of mass
Avogadro's principle
What are the coefficients that will balance the skeleton equation below?
AlCl3 + NaOH → Al(OH)3 + NaCl
1,3,1,3
3,1,3,1
1,1,1,3
1,3,3,1
A sample of gas occupies 52.0 mL at 20℃ and 1.00 atm. What volume will it occupy at 40℃ and 1.00 atm?
62.4 mL
44.8 mL
55.5 mL
48.7 mL
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?
2Al(s) + 3FeO(s) → 3Fe(s) + Al2O3(s)
1.2 mol
0.8 mol
1.6 mol
2.4 mol
What is the name of H2SO4?
hyposulfuric acid
hydrosulfuric acid
sulfuric acid
sulfurous acid
When an equation is used to calculate the amount of product that could form during a reaction, then the value obtained is called the ____.
Actual yield
Percent yield
Minimum yield
Theoretical yield
The equation 2C3H7OH + 9O2 → 6CO2 + 8H2O is an example of which type of reaction?
Combustion reaction
Single replacement reaction
Double replacement reaction
Decomposition reaction
A process that absorbs heat is a(n) _________.
Exothermic process
Polythermic process
Endothermic process
Ectothermic process
The reaction shown is an ________________ reaction because it has a _____________ enthalpy.
Exothermic; negative
Exothermic; positive
Endothermic; negative
Endothermic; positive
Water and methane molecules are roughly the same size and the same mass but water boils at a much higher temperature. What can we conclude about the intermolecular forces between water and methane?
water has stronger intermolecular forces than methane
water has weaker intermolecular forces than methane
methane has stronger intermolecular forces than water
methane and water have similar intermolecular forces
The diagram provided here shows the reactants and the products of a common chemical reaction. The line on the graph behind them represents the energy of the system as the reaction progresses. Which of the following conclusions is best supported by the information provided?
This is a fast reaction.
This is a slow reaction.
This reaction is endothermic.
This reaction is exothermic.
If a reaction is endothermic
the energy required to break bonds is less than the energy released when new bonds are formed.
the energy required to break bonds is more than the energy released when new bonds are formed.
the energy required to form bonds is less than the energy released when bonds are broken.
the energy required to form bonds is more than the energy released when bonds are broken.
Two of anything means a "pair". What quantity does 6.02x1023 represent?
a mole
a ream
an Avagadro
a score
A reaction was predicted to produce 50 grams of a compound. When the product was measured, there were only 45 grams made. What is the percent yield of this reaction?
90%
95%
10%
5%
A 12 mL balloon is heated from 200 K to 300 K. Which of the following is a likely volume after the balloon is heated?
18 mL
10 mL
12 mL
4 mL
What color do acids turn litmus paper?
Blue
Pink
Clear
Red
A(an) __________ bond exists between two nonmetals.
ionic
covalent
What is a negatively charged atom called?
Anion
Cation
Ion
What is a valence electron?
an electron that is found in the outermost shell of an atom.
an electron found in the innermost shell of an atom.
an electron found in the middle shell.
Determine the number of moles of AlNO3 that are in 264 g of the compound.
2.97 mol
3.45 mol
2.73 mol
1.86 mol
A baker needs 6 g of baking soda for a recipe. The chemical formula for baking soda is NaHCO3. How many moles of baking soda is needed?
0.071 mol
0.167 mol
0.273 mol
0.214 mol
How many grams of hydrogen are produced if 120 g of Na are available?
What is the name for this group of elements?
Alkali
Halogens
Noble Gases
Alkali-Earth
What are isotopes?
different element with the same number of electrons
same element with a different number of electrons
same element with a different number of neutrons
different element with the same number of neutrons
The modern periodic table is arranged in order of increasing atomic ____.
mass
charge
number
radius
How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration?
1
2
3
4
What is the net charge of the ionic compound calcium fluoride?
2-
1-
0
1+
A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility
lowering the temperature of the solvent
stirring the solute in the solution
increasing the pressure on the solution
increasing the particle size of the solute
Which of the following is the correct formula for calculating molarity?
moles/liters of solution
moles/kg of solvent
# particles/Avogadro's #
theoretical yield/actual yield
Which of the following types of solutions has more room to dissolve solute?
supersaturated
saturated
unsaturated
What does pH measure?
the amount of hydrogen (H+) ions
the amount of hydroxide (OH-) ions
amount of water
all of the above
For a solution at 25oC, pH + pOH =
7
14
1.0 x 10-14
-log (1.0 x 10 -14)
If the [H3O+] of a solution is 1 x 10-3 M, the pH is
11
-3
3
1
Which will dissolve faster? Crushed table salt or a cube of table salt. Assume they have an equal mass.
crushed table salt
crystal of table salt
When no more solute dissolves the solution is _________
supersaturated
unsaturated
saturated
extra saturated
What is the volume of the fluid in the graduated cylinder shown?
12.0 ml
13.0 ml
13.5 ml
12.5 ml
_______ are substances made of only one type of atom.
Compounds
Elements
Mixtures
Solutions
If you have 15 grams of Baking Soda and 20 grams of Vinegar as products, what would you expect the mass of your reactants to be?
15 grams
20 grams
5 grams
35 grams
What is a substance produced during a chemical reaction?
product
reactant
law of conservation of mass
chemical reaction
Which name represents the formula Fe2O3 ?
Iron (III) oxide
Iron (II) oxide
In general as temperature decreases, the solubility...
increases
decreases
stays the same
CuCl2 + NaOH → Cu(OH)2 + NaCl
Which product is insoluble?
CuCl2(aq) + NaOH(aq) → Cu(OH)2(s) + NaCl(aq)
CuCl2 + NaOH → Cu(OH)2 + NaCl
Which product is insoluble?
Define: Solubility
What is dissolved
What does the dissolving
A measure of how much solute can dissolve in solvent
a charged ion
