Unit 1.2 Test Part 1 2024

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the components are not uniformly distributed, and different parts can be seen and separated, such as a salad or pizza.

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What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together, such as carbon dioxide (CO2) or water (H2O).

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Why is oxygen classified as a pure substance?

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Oxygen is classified as a pure substance because it consists of only one type of molecule, while air is a mixture of various gases.

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What are intensive properties?

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Intensive properties are properties that do not depend on the amount of substance present, such as density, boiling point, and color.

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What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that appears uniform throughout, where the individual components are not distinguishable, such as saltwater or air.

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means, such as hydrogen (H) or gold (Au).

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What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed from the chemical combination of two or more elements.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where different ingredients can be seen and separated.

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What is the definition of a solution?

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A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), such as sugar dissolved in water.

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What is the significance of the density of a substance?

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Density is an intensive property that helps identify substances and can affect how they interact with other materials.