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Topics | Replies | Views | Last post |
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Chemistry \ Why is carbon dioxide classified as an inorganic compound? Started by ChinaCat |
3 | 46491 | Last post by Chemistry4me 22/11/2008 04:48:40 |
Chemistry \ Why is helium smaller than hydrogen ? Started by ChinaCat |
2 | 44094 | Last post by Kryptid 07/01/2004 01:41:25 |
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