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WorksheetsChemistry EOC Review 2024
Total questions: 40
Worksheet time: 33mins
How does a scientific theory become a law?
A hypothesis is written on how/why there is a relationship between two variables.
Possible explanations are given for the relationship between two variables.
Many scientists give evidence for the relationship between two variables.
One scientist finds evidence for a relationship between two variables.
Which is the correct Lewis dot diagram for potassium?
What happens when sodium reacts with fluorine to form sodium fluoride?
Electrons are shared and the bonding is ionic.
Electrons are shared and the bonding is covalent.
Electrons are transferred and the bonding is metallic.
Electrons are transferred and the bonding is ionic.
Covalent bonds occur between two nonmetals. What types of atoms make ionic bonds?
two nonmetals
two metal atoms
a metal and a nonmetal
noble gases
Which is the correct formula for the compound Iron(II) chlorate?
Fe(ClO3)2
Fe2(ClO3)1
Fe(ClO3)3
Fe3(ClO3)2
What two pure substances are present in this solution?
Water is the only pure substance.
The ionic solid represented by big green atoms and small white atoms is the only pure substance.
Water and the ionic solid are the two pure substances.
The solution of dissociated ions and water is a pure substance.
Which diagram represents the bonding in lithium chloride?
Li-Cl
This is the Lewis dot diagram of the carbon atom. What does having four valence electrons allow carbon to do?
Carbon can form one covalent bond with other atoms.
Carbon can form two covalent bonds with other atoms.
Carbon can form three covalent bonds with other atoms.
Carbon can form four covalent bonds with other atoms.
What is the molar ratio of carbon dioxide to oxygen when the following reaction is balanced?
CH4 + O2 → H2O + CO2
2:2
1:2
1:1
2:3
HCl + Fe2O3 → FeCl3 + H2O
Balance the above equation and determine the molar ratio of Iron(III) Oxide to Iron(III) chloride?
1:1
1:2
1:3
1:4
How many formula units of Ca(OH)2 are there in 148 grams of that compound?
6.02 x 1023
1.204 x 1024
1.806 x 1024
6.02
N2 + 3H2 --> 2NH3
When nitrogen gas reacts with hydrogen gas, ammonia is produced.
How much ammonia will be produced from 2.3 moles of nitrogen gas?
1.15 moles
2.3 moles
4.6 moles
6.9 moles
2C2H6+_O2 → 4CO2+6H2O
What is the coefficient for oxygen gas when this reaction is completely balanced?
2
5
7
10
N2 + 3H2 --> 2NH3 + energy
How many grams of hydrogen are needed react and use up all of 56 grams of nitrogen to make ammonia and energy?
2 grams
4 grams
6 grams
8 grams
What is the molar mass of Mg(OH)2
58.31
23.00
32.00
16.12
Which equation represents a double replacement reaction?
Pb(NO3)2+
2KI → 2KNO3 + PbI2(s)
2 AlCl3 → 2Al + 3 Cl2
2Al + 3Cl2 → 2AlCl3
none of the choices are double replacement reactions.
What type of reaction is this?
Zn + 2HCl -> ZnCl2 + H2
double replacement
acid base neutralisation
synthesis
single replacement
What are the products of the following reaction?
HF + Br2→__ + __
HBr
F2
HBr + F2
H2O
What type of reaction is represented by the following equation?
2H2 + O2 → 2H2O
double replacement
single replacement
acid base neutralisation
synthesis
Which is the product(s) of the following reaction?
2 C8H18 (l) + 25 O2 (g) → ?
Oxygen
Carbon dioxide
Water and carbon dioxide
ammonium
In an endothermic reaction...
products have less energy than reactants
products have more energy than reactants
products and reactants have equal energy
all the choices are correct
Heat packs warm up after they are activated to produce heat in emergency situations. What type of chemical reaction must be involved for heat packs to work?
the reaction is exothermic and absorbs energy
the reaction is endothermic and absorbs energy
the reaction is exothermic and gives of energy
the reaction is endothermic and gives off energy
At high pressure and low temperature
salts are most soluble in liquids
gases are most soluble in liquids
there are fewer collisions of gas particles
solubility of gases is not affected
kinetic collision theory states:
the atom is the smallest indivisible unit of nature
an increase in moles will increase pressure
a chemical reaction will occur when particles collide with sufficient energy and orientation
matter is not created or destroyed in a chemical reaction
In the mason jar, liquid water and water vapor were at equilibrium. This would indicate that...
the mass of liquid and vapor water were equal
the number of water gas and liquid water particles were equal
the concentration of liquid water and water vapor is equal
the rate at which liquid water becomes water vapor and water vapor condenses is equal
6CO2 +6H2O + energy <=> C6H12O6 +6O2
This is the chemical reaction for photosynthesis. It requires a constant input of solar radiation in order to make sugar and oxygen gas. Which of the following statements is true.
If it gets colder, the reaction will shift to the right
if it gets warmer, the reaction will shift to the left
if it gets colder, more sugar will be produced
if it gets warmer more oxygen will be produced
What happens when the pressures of carbonic acid (product) and water and carbon dioxide (reactants) become constant and level?
the rates of forward and reverse reaction become equal
equilibrium is reached
concentrations will remain constant but the reaction will continue
all of the choices are correct
In this reaction, hydrochloric acid is donating a proton to water.
Which of the chemicals would be considered a base?
hydronium
chlorine ion
water
HCl
What describes a solution of NaOH?
the solution has a pH of more than 7
the solution has a pH of 7
the solution has a pH of less than 7
the solution is acidic
What does 2.3 M (molar) indicate?
grams
liters
moles per liter (concentration)
mols
What is the name given for a chemical that dissolves in water and allows the resulting solution to conduct electricity?
solvent
compound
electrolyte
solute
When HCl dissolves in water, it donates its hydrogen ion (a proton) and increases the H+ concentration. What does HCl act as in this situation?
Arrhenius acid
Bronsted-Lowry acid
both Arrhenius and Bronsted-Lowry acid
a base
How many moles of H2O2 are there in a 102 gram sample? Molar mass of H2O2 is 34 grams/mole.
1
2
3
4
What is the percent composition by mass of hydrogen in water?
11%
89%
100%
67%
Given the balanced chemical equation, how many moles of Iron chloride will theoretically be produced from 3 moles of chlorine gas?
2Fe + 3Cl2 = 2FeCl3
1
2
3
4
Given the balanced chemical equation, how many grams of iron are required to completely react with 213 grams of chlorine gas?
2Fe + 3Cl2 = 2FeCl3
56g
112g
71g
213g
How many moles of oxygen are produced when 4 moles of potassium chlorate decompose?
2 KClO3 ( s ) → 2KCl ( s ) + 3O2 ( g )
2
4
6
8
How many moles are in 1.18 x 1026 molecules of carbon dioxide?
118 moles
196 moles
223 moles
2.04 x 1023 moles
This potential energy diagram indicates which type of reaction?
exothermic
endothermic
acid base
redox
Diamonds are made from a network of covalently bonded carbon atoms. Why can carbon make a variety of organic compounds?
Carbon can form double and triple bonds
carbon has a tetrahedral molecular geometry
carbon has four valence electrons and can covalently bond with many other types of atoms
carbon can ionize easily
