Properties of Substances

Andres is a chemist working at a company that makes ink. To make a new kind of ink, Andres mixed two liquid substances together in a sealed container. The diagram shows the repeating groups of atoms that make up the two starting substances. After mixing, Andres found two solid substances in the sealed container. (Nothing had escaped.) Which of the diagrams to shows the repeating groups of atoms that make up the ending substances?

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• B
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• D

After mixing, the workers found two substances that melt at higher temperatures in the sealed container. (Nothing had escaped.) Which of the diagrams shows the repeating groups of atoms that make up the ending substances?

• A
• B
• C
• D

The diagram above shows the repeating groups of atoms that make up two samples. Will the properties of the two samples likely be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The properties will likely be different because there are more repeating groups of atoms in Sample 2.
• The properties will likely be different because the repeating groups of atoms that make up each sample are different.
• The properties will likely be the same because the repeating groups of atoms that make up the two samples have one of the same types of atoms.
• The properties will likely be the same because the repeating groups of atoms that make up the two samples have the same number of atoms.

The diagram shows the repeating groups of atoms that make up two samples. Both samples are gases at room temperature. Will the other properties of the samples likely be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will likely be the same because the repeating groups of atoms that make up the two samples have the same types of atoms.
• The other properties will likely be the same because both samples are gases at room temperature.
• The other properties will likely be different because there are more repeating groups of atoms in Sample 1.
• The other properties will likely be different because the repeating groups of atoms that make up the two samples have different numbers of atoms.

The diagram above shows the repeating groups of atoms that make up two samples. Both samples are solids at room temperature. Will the other properties of the two samples likely be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will likely be different because there are more repeating groups of atoms in Sample 2.
• The other properties will likely be different because the repeating groups of atoms that make up the two samples have different numbers of atoms.
• The other properties will likely be the same because the repeating groups of atoms that make up the two samples have the same types of atoms.
• The other properties will likely be the same because both samples are solids at room temperature.

The diagram below shows the repeating groups of atoms that make up two samples. Both samples are red powdery solids at room temperature. Will the other properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will be different because there are more repeating groups of atoms in Sample 1.
• The other properties will be the same because both samples are red at room temperature.
• The other properties will be the same because both samples are powdery solids at room temperature.
• The other properties will be same because the repeating groups of atoms that make up the two samples are the same.

A scientist mixed two samples together: a white solid that boils at about 800°C and a colorless gas that boils at about 70°C. He analyzed the results and found two ending substances. One of the ending substances boils at 245°C. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams shows the repeating groups of atoms that make up the samples the scientist mixed together?

• A
• B
• C
• D

Devorah is a food chemist, and she is developing a chemical to help foods stay fresh longer. She mixed a red liquid substance and a colorless solid substance together in a sealed container. The diagram below shows the repeating groups of atoms that make up the two starting substances. After mixing, Devorah found two white substances in the sealed container. (Nothing had escaped.) Which of the diagrams shows the repeating groups of atoms that make up the ending substances?

• A
• B
• C
• D

Does her model correctly show how the atoms rearrange to form a chemical reaction in a sealed enviornment?

• Yes, the atoms have rearranged to make new bonds.
• No, atoms can not be created or destroyed.

A scientist mixed two samples together: a colorless liquid that melts at 12°C and a yellow solid that melts at 390°C. She analyzed the results and found two ending substances. One of the ending substances was a gray solid. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams shows the repeating groups of atoms that make up the samples the scientist mixed together?

• A
• B
• C
• D