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Which of the following do water (H2O), rust (Fe2O3), and salt (NaCl) have in common?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
A cold can of juice is removed from the refrigerator and is placed outdoors on a warm day. After several minutes, moisture appears on the outside of the cold can. Which of the following statements best explains why the moisture appears?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
Which of the following units best represents the density of an object?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
Ms. Bristol measured the mass of a closed beaker containing several ice cubes. The mass was 100 g. An hour later, after the ice cubes had melted, Ms. Bristol measured the mass of the beaker again. What was the mass of the beaker of water the second t
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
Which of the following is an example of a container that is filled with a pure substance rather than with a mixture?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
Which of the following is an example of a physical change but not a chemical change?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
A student is given a sample of an unknown liquid to test in the laboratory. The student thinks that the liquid is water. Which of the following physical properties of the sample is most helpful to determine if the liquid is water?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
Sulfur (S), oxygen (O2), water (H2O), and 15 sodium chloride (NaCl) are all examples of pure substances. Which of the following describes all pure substances?
boiling point of the liquid
Water, rust, and salt are compounds.
a balloon filled with helium
100 g
g/cm^3
Water vapor in the air condenses into a liquid on the cold can.
A pure substance has a definite chemical composition.
A water pipe freezes and cracks on a cold night.
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