Последние добавленные видео:
Oxidy
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7351 5 years ago 26:41Oxidy
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7 years ago
209072 7 years ago 6:05Make Mercury Metal (Decomposition of Mercury (II) Oxide)
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3 years ago
15055 3 years ago 7:10Oxidy | Chemické názvoslovie | Príklady
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4 years ago
1141 4 years ago 19:37Chemické názvosloví #1 (OXIDY)