Matter
Matters
Periodic
Patterns
Elements
Compounds
Mixtures
Physical or Chemical
Watery Mass
100
Student in a chemistry lab measure the time it takes four different 100 mL solutions to pass through a hole in the bottom of a cup. Which of the following properties of the solutions is most likely being measure?

A. Buoyancy
B. Mass
C. Viscosity
D. Volume

What is
C. Viscosity
100
Compounds with the same chemical composition may have different densities because they--

A. Have differences in reactivity
B. are able to bond with oxygen
C. vary in solubility
D. exist in different phases

What is
D. exist in different phases
100
Which of these are composed of two or more different substances that are chemically combined in a definite ratio?

A. Compounds
B. Mixtures
C. Elements
D. Solutions

What is

A. Compounds

100
Which of these describes a chemical change?

A. Frost disappears from a window in the morning
B. A decrease in temperature reduces the volume of gas
C. soot formed as a candle burns
D. A cup of hot tea cools down

What is
C. soot formed as a candle burns
100
All of these can affect the rate at which a solid dissolves in water except--

A. decreasing air pressure
B. stirring the water
C. increasing the temperature of water
D. using larger crystals of the solid

What is

A. decreasing air pressure

200
What is the mass of a 500.00 mL sample of seawater with a density of 1.025 g/mL?

A. 487.4 g
B. 500.0 g
C. 512.5 g
D. 625.0 g

What is
C. 512.5 g
200
Which of these elements is most likely to donate one electron?

A. Be
B. Cs
C. Rn
D. He

What is
B. Cs
200
A model shows an element with 7 protons and 9 neutrons. What element is being modeled?

A. Nitrogen
B. Fluorine
C. Helium
D. Sulfur

What is
A. Nitrogen
200
In the rock cycle, which of these is a chemical change involved with the formation of igneous rocks?

A. compression of sediments
B. heat loss from lava
C. subduction of plates
D. formation of minerals

What is
D. formation of minerals
200
Over time an open soft drink will lose carbonation (dissolved CO2). Which of these allows the CO2 to remain in solution the longest?

A. reduced air pressure
B. expose to direct sunlight
C. increase air currents
D. cooler temperatures

What is
D. cooler temperatures
300
What is the density at 20°C of 12.0 mL of a liquid that has a mass of 4.05 g?

A. 0.338 g/mL
B. 2.96 g/mL
C. 16.1 g/mL
D. 48.6 g/mL

What is
A. 0.338 g/mL
300
A certain atom has a nucleus containing four protons and six neutrons and has four electrons orbiting the nucleus. This atom is a form of the element--

A. boron
B. carbon
C. neon
D. beryllium

What is
D. beryllium
300
Oxygen (O2) is an example of--

A. an alloy
B. a molecule
C. a salt
D. a mixture

What is
B. a molecule
300
Which of the following is an example of a chemical change?

A. Combustion of gasoline
B. An apple being bitten
C. An ice cube being swallowed
D. Absorption of water molecules

What is
A. Combustion of gasoline
300
If the properties of water were to change so that the solid form was denser than the liquid form, organisms living in a cold pond environment would be less likely to survive because water would no longer--

A. dissolve enough oxygen from the air
B. produce solutions containing vital nutrients
C. remain neutral, instead of becoming highly acidic
D. produce a floating insulation layer of ice.

What is
D. produce a floating insulation layer of ice.
400
A sample of water from a stream has a greater density than a sample of distilled water. Which is the best explanation for the difference in density?

A. Streams have kinetic energy
B. Distilled water has a neutral pH
C. Steams can contain dissolved salts.
D. Distilled water can contain dissolved gases

What is
C. Steams can contain dissolved salts.
400
The ionic compounds that result from combining Group 2 and Group 16 elements have a 1:1 ratio because--

A. Group 2 elements are electrically neutral
B. Group 2 elements have two valence electrons
C. Group 2 elements contain neutrons in the nucleus
D. Group 2 contains more elements than other groups


B. Group 2 elements have two valence electrons What is
400
Al3+ SO42-

According to this information, what is the chemical formula for aluminum sulfate?

A. AlSO4
B. Al2(SO4)3
C. Al3(SO4(2
D. Al6SO4

What is
B. Al2(SO4)3
400
Limestone is a sedimentary rock consisting mostly of calcium carbonate (CaCO3). Which process is most likely to cause a chemical change in limestone?

A. Freezing water cracking limestone
B. Flowing water eroding a limestone riverbed
C. Acid rain forming puddles on limestone
D. Coastal waves dissolving limestone sediment

What is
C. Acid rain forming puddles on limestone
400
The structure of pure water makes it a good--

A. solvent
B. catalyst
C. conductor
D. nutrient

What is

A. solvent

500
As the viscosity of a liquid increases, the liquid--

A. Conducts electricity
B. pours more slowly
C. evaporates more quickly
D. forms a precipitate

What is
B. pours more slowly
500
The elements from which of the following groups are most likely to react with potassium (K)?

A. Group 2
B. Group 7
C. Group 13
D. Group 17

What is
D. Group 17
500
Copper oxide (CuO) is formed when pure copper reacts with the oxygen in the air. CuO is an example of--

A. Mixture
B. Compound
C. Element
D. Isotope

What is
B. Compound
500
Which of these describes a pollution-producing process that involves only a physical change?

A. Coal with a high sulfur content is burned producing gases that cause acid rain
B. Chlorofluorocarbons are released, changing ozone in the upper atmosphere into oxygen
C. hot wastewater is discharged into a lake lowering oxygen levels in the water
D. Nitrogen oxide emissions combine with water vapor, producing nitric acid

What is
C. hot wastewater is discharged into a lake lowering oxygen levels in the water
500
Dissolving salt in water increases the conductivity of the solution because the--

A. salt gives the solution a net negative charge
B. salt ions bond with available water molecules
C. solution has an increase in kinetic energy
D. concentration of ions in solution increases

What is
D. concentration of ions in solution increases
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