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"Ethanol and Acetic Acid" Organic Compounds PPT Courseware (Classification of Functional Groups and Organic Compounds in Lesson 3)
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"Classification of Elements and Matter" PPT courseware of elements and the world of matter (an important mixture in Lesson 2 - colloid)
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"Classification of Elements and Matter" PPT courseware of elements and the world of matter (an important mixture in Lesson 2 - colloid)
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"Nitrogen Cycle" Nature and Transformation of Matter PPT (Lesson 3: The Impact of Nitric Acid Human Activities on the Nitrogen Cycle and the Environment)
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