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Students 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 measured?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
Rust (Fe2O3) forms on an iron (Fe) pipe after prolonged exposure to humid air. What type of change does this illustrate?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
The buoyant force that a fluid exerts on objects is increased when there is an increase in the fluid’s —
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
Which of the following processes is an example of a physical change associated with an oak tree?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
Sheets of ice containing mostly pure water can be formed by decreasing the temperature of saltwater. Which of these best describes this change?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
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?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
Which of these are composed of two or more different substances that are chemically combined in a definite ratio?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
Which of these is the most appropriate unit of measure for reporting the density of a solid?
g/cm 3
Chemical
Physical change
Evaporation of water from the surfaces of leaves
Viscosity
density
Streams can contain dissolved salts.
Compounds
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