Question: Which of the following salts is MOST insoluble?
Answer Options:
Ammonium carbonate
Potassium nitrate
Lead iodide
Potassium phosphate
Answer: Lead iodide
Question: What are complex ions made of?
Answer Options:
A valance electron and polyatomic ion
Monatomic ions and a Lewis dot structure
Neutral molecules and electrons
A metal ion and ligands
Answer: A metal ion and ligands
Question: The energy in electromagnetic waves is measured in terms of a single _____.
Answer Options:
Electron
Proton
Photon
Nucleus
Answer: Photon
Question: Which equation represents the ideal gas law?
Answer Options:
PRT = nV
PV > nRT
PV < nRT
PV = nRT
Answer: PV = nRT
Question: What is the chemical formula for the ionic compound magnesium bromide?
Answer Options:
MBr₂
2MG₂ Br
MgBr
MgBr₂
Answer: MgBr₂
Question: An atom with unpaired electrons is referred to as a(n) _____.
Answer Options:
Paramagnetic
Diamagnetic
Covalent
Ionized
Answer: Paramagnetic
Question: Which statement concerning the Van Der Waals equation is MOST accurate?
Answer Options:
It explores the relationship between the effusion rate of a gas and its molecular mass.
It helps us understand the behavior of gases under extreme conditions.
It measures the enthalpy change of a chemical reaction at different heat capacities.
It explains how the law of conservation of energy works within both open and closed systems.
Answer: It helps us understand the behavior of gases under extreme conditions.
Question: A pure substance that cannot be broken down by chemical methods into simpler components is called a(n) _____.
Answer Options:
Element
Matter
Neutron
Atom
Answer: Element
Question: Which of the following has an enthalpy of formation of zero?
Answer Options:
Carbon
Iron oxide
Carbon dioxide
Water
Answer: Carbon
Question: Which of the following tests would best show the phase change of vaporization?
Answer Options:
Heating a pot of water on the stove
Placing a tray of water in the freezer
Placing a cold drink in a warm room
Melting a snowball
Answer: Heating a pot of water on the stove
Question: Which weak acid has two hydrogen, one sulfur, and three oxygen atoms, and acts as a good reducing agent?
Answer Options:
Hydrosulfurous acid
Sulfurous acid
Sulfuric dioxide acid
Hydrosulfuric acid
Answer: Sulfurous acid
Question: An atom that is highly electronegative _____.
Answer Options:
Cannot form ionic bonds
Repels more electrons
Attracts more electrons
Cannot form covalent bonds
Answer: Attracts more electrons
Question: When solutes are ions, aqueous solutions are called _____.
Answer Options:
Precipitative
Electrolyte
Arrhenius
Oxidized
Answer: Electrolyte
Question: In a binary ionic chemical substance, which ion would you expect to have the lower electronegativity value?
Answer Options:
The metal cation
The nonmetal anion
The ligand
The covalent compound
Answer: The metal cation
Question: Sylvia has 1 mole of gold atoms. How many grams of gold does she have?
Answer Options:
0.00086 grams
1 gram
197 grams
2,482 grams
Answer: 197 grams
Question: A nitrogen ion with a net charge of -3 has _____.
Answer Options:
Gained 3 protons
Lost 3 protons
Gained 3 electrons
Lost 3 electrons
Answer: Gained 3 electrons
Question: What does it mean when an atom has a positive oxidation number?
Answer Options:
It has gained protons.
It has lost electrons.
It has combined with an oxygen atom.
It is in its purest elemental form.
Answer: It has lost electrons.
Question: Jeffrey is playing darts with some friends. All five of his darts miss the bull’s eye, but they are all grouped in a similar area. Jeffrey is _____.
Answer Options:
Precise but not accurate
Both accurate and precise
Neither accurate nor precise
Accurate but not precise
Answer: Precise but not accurate
Question: Add the following numbers together and determine the value of the answer rounded to the correct number of significant figures: 6.05 + 5.111 + 12.9861
Answer Options:
24
24.15
24.1471
24.147
Answer: 24.15
Question: The supply of aged cheddar cheese is inelastic, and the supply of bread is elastic. Both goods are considered to be normal goods by a majority of consumers. Suppose that a large income tax increase decreases the demand for both goods by 10%. The equilibrium quantity will:
Answer Options:
Increase in both the aged cheddar cheese and bread markets.
Increase in the aged cheddar cheese market and decrease in the bread market.
Decrease in the aged cheddar cheese market and increase in the bread market.
Decrease in both the aged cheddar cheese and bread markets.
Answer: Decrease in both the aged cheddar cheese and bread markets.
Question: What are the subatomic particles of an atom?
Answer Options:
protons, neutrons, nucleus
protons, neutrons, electrons
protons, neutrons, orbitals
protons, electrons, nucleus
Answer: protons, neutrons, electrons
Question: What is the atomic number of lithium?
Answer Options:
Three, equal to the number of protons
Four, equal to the number of neutrons
One, equal to the difference of neutrons and protons in the nucleus
Seven, equal to the total number of protons and neutrons in the nucleus
Answer: Three, equal to the number of protons
Question: How many protons does Potassium have?
Answer Options:
14 protons
19 protons
13 protons
20 protons
Answer: 19 protons
Question: Why did the scientists have to come up with a different model after Bohr?
Answer Options:
Bohr’s model did not explain the stability of the nucleus
Bohr assumed that electrons should lose energy and fall into the nucleus
Bohr considered electrons to have both a known radius and orbit
Bohr’s model did not describe the arrangement of electrons in orbit
Answer: Bohr considered electrons to have both a known radius and orbit
Question: How is the energy for this process stored?
Answer Options:
A generator converts solar energy into electricity. Electricity is used to power a watering system
A generator converts solar energy into electricity used to pump water from the sea to the reservoir
Electricity is used to pump the water from the sea to the reservoir. Water flowing back down drives a generator which makes electricity
Electricity powers a watering system. Water flows from the reservoir to the sea turning a generator which makes electricity
Answer: Electricity is used to pump the water from the sea to the reservoir. Water flowing back down drives a generator which makes electricity
Question: Can you think of a reason why this way of storing energy is not ideal for our solar power plant?
Answer Options:
Moving water around is not storing energy
Because the solar power plant is located in a desert, far from large bodies of water
Because it is a solar power plant and not a water power plant
Potential energy is not as good as electrical energy
Answer: Because the solar power plant is located in a desert, far from large bodies of water
Question: Lithium-ion batteries are not used for long term storage of energy. Why do you think that is?
Answer Options:
Because they lose charge over time
Because they take a long time to charge
Because they can only be used for small items, like phones
Because they are not safe to use
Answer: Because they lose charge over time
Question: How do you think we can determine how much energy is stored in a chemical compound?
Answer Options:
Measure the electrochemical properties using cyclic voltammetry
Burn it and measure how much heat it releases
Measure the energy in the bonds using infrared spectroscopy
Put it into a fuel tank and measure how far the car can drive
Answer: Burn it and measure how much heat it releases
Question: Which part of the equation stays constant in this experiment?
Answer Options:
H (enthalpy)
U (energy)
V (volume)
p (pressure)
Answer: V (volume)