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May 13, 2020, 8:02 p.m.
chemistry

Aldehyde and Ketones

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April 6, 2020, 1:01 p.m.
chemistry

DGT Surface Chemistry

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April 6, 2020, 1:01 p.m.
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DGT States of Matter gases and liquids

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April 6, 2020, 1 p.m.
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DGT Some Basic Concepts of Chemistry

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April 6, 2020, 12:59 p.m.
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DGT S Block Elements

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April 6, 2020, 12:58 p.m.
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DGT Redox Reaction