19 ビュー · 10 5月 2024
Group 4 lesson
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15 2月 2024
Carbon and its compounds (hydrides, halides, oxides, Carbonic acids);
Silicon and its compounds (reaction of silicon dioxide with sodium hydroxide and hydrogen fluoric acid)
compounds of germanium, tin and lead (oxides, chlorides, nitrates)
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19 ビュー · 10 5月 2024
