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Vypočítej výšku obecného trojúhelníku, je-li obsah 425 dm2 , a = 25dm.
Vypočítejte objem roztoku H2SO4 (w = 0,1; ρ = 1,066 g·cm-3), který zneutralizuje 0,69 dm3 roztoku KOH (w = 0,1; ρ = 1,09 g·cm-3). (Výsledek zaokrouhlete na tři desetinná místa). M(kyseliny sírové) =…
Vypočítejte, kolik procent nečistot obsahuje technický FeSO4 . 7 H2O. 2,5 g vzorku bylo rozpuštěno na 100 ml roztoku. K manganometrické titraci bylo odebráno 10 ml. Nalezená spotřeba KMnO4 (c = 0 …
Jaká je látková koncentrace 10% roztoku NaOH?, Hustota roztoku je 1,11g/cm3 M (NaOH) = 40g/mol
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