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1. Je pravda, že soli s1 prvkov sú rozpustné, zatiaľ čo soli s2 prvkov sa vo vode takmer nerozpúšťajú?
2. Je pravda, že rozpustnosť solí s2 prvkov, ako sírany, uhličitany a fosforečnany, klesá v skupine od vápnika po bárium?
Vypočítať hodnotu určitého integrálu danej funkcie na danom intervale. V excelovskej tabuľke uviesť rozdelenie daného intervalu na 5, 10 a 20 častí mnou vybranými deliacími bodmi. Vypočítať dolný…
Klíčivosť semien rastlín. Dobrý deň, vedel by niekto vypracovať alebo pomôcť s vypracovaním pozorovania a záveru tohto protokolu?
Dobrý deň, ako prosím funguje názvoslovie týchto zlúčenín ? Napríklad dusičnan draselno-talný. Ako sa pri takýchto zlúčenínach píšu oxidačné čísla ? Ďakujem
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