Questions and Answers
What type of mixture is a sand and salt mixture?
What type of mixture is salt water?
What type of substance is pure water?
What type of mixture is a tossed salad?
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What type of substance is hydrogen?
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What type of mixture is unfiltered air?
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What type of mixture is an apple?
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What type of material is granite?
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What type of substance is iron?
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What type of mixture is iron with rust?
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What type of mixture is nitric acid?
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What type of material is wood?
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Study Notes
Classification of Mixtures and Substances
- Sand & salt mixture is considered heterogeneous due to the visible differences in composition.
- Salt water is classified as homogeneous since its components (salt and water) are uniformly dissolved.
- Pure water is a pure substance since it contains only H2O molecules without any impurities.
- A tossed salad is heterogeneous because the different ingredients (vegetables, dressing, etc.) can be distinguished visually.
- Hydrogen is categorized as a pure substance; it is a diatomic molecule consisting solely of H2.
- Unfiltered air is homogeneous, as it consists of a mixture of gases (like nitrogen and oxygen) that are uniformly mixed.
- An apple is heterogeneous because its internal structure (seeds, flesh, skin) can be identified.
- Granite is also heterogeneous; it is an igneous rock composed of various minerals that can be distinguished.
- Iron is a pure substance composed only of iron atoms, indicating high purity.
- Iron with rust is classified as heterogeneous; rust (iron oxide) appears distinctly from pure iron.
- Nitric acid is homogeneous as it features a uniform mixture of nitrogen, oxygen, and hydrogen atoms in solution.
- Wood is heterogeneous due to its varied structure; it includes distinct fibers, cells, and natural variation.
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Description
Test your knowledge on the classification of various mixtures and substances with this quiz. Identify whether the examples are heterogeneous, homogeneous, or pure substances. Perfect for students learning about chemistry concepts.
