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Dobrý deň vedel by mi niekto pomôcť určiť elementárnu textovú jednotku v texte ďakujem
Dobrý deň potrebovala by som pomôcť s postupom a výpočtom týchto príkladov: ďakujem 10.Vypočítajte koľko % vodíka sa nachádza v molekule sírovodíka: Ar(H)=1, Ar(S)=32 11.Na prípravu 2% roztoku Ca…
Dobrý den vedel by mi niekto povedať na čo slúži čapik v ústnej dutine?? Ďakujem za odpoveď
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