QQuestionChemistry
QuestionChemistry
Is salad (lettuce, tomato, and onion) a pure substance or a mixture?
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Answer
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Step 1:I'll solve this problem step by step:
Step 2:: Understand the Definitions
- A pure substance is a material that has a constant composition and uniform properties throughout - A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means
Step 3:: Analyze the Components of Salad
- Salad contains multiple different substances: * Lettuce (a plant tissue) * Tomato (another plant tissue) * Onion (another plant tissue) - These components have different: * Chemical compositions * Physical properties * Cellular structures
Step 4:: Determine the Classification
- Since salad contains multiple different substances that can be physically separated - The components are not chemically combined into a single uniform substance - The composition can vary (different amounts of each ingredient)
Step 5:: Conclusion
- Salad is a MIXTURE (specifically, a heterogeneous mixture) - It is NOT a pure substance
Final Answer
Salad is a mixture, not a pure substance, because it contains multiple different types of ingredients that can be physically separated and do not have a uniform composition.
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