Din ce este formată apa? Din hidrogen şi oxigen, ştim cu toţii. Dar iată cum se verifică simplu, într-un experiment cu electroliză. Înţepăm cu două piuneze fundul unui recipient cu apă, aşa ca aici. Apoi aşezăm recipientul pe o baterie de 9 Volţi şi adăugăm, dacă vrem, două recipiente de colectare a gazului. Curentul electric circulă prin piuneze şi apă. În urma electrolizei apei se eliberează hidrogen la borna negativă şi oxigen la borna pozitivă, care va reacţiona în plus cu mediul. În măsurăt
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John (Not My Real Name) Dinosaur on Instagram: "CRYODRAKON Cryodrakon is a genus of azhdarchid pterosaur that lived during the late Campanian age of the Late Cretaceous period in what is now Canada, around 76.7 and 74.3 million years ago. Starting in 1972, fossil remains of large azhdarchid pterosaurs have been reported from Alberta. Paleontologists assigned them to the genus Quetzalcoatlus, given that it was the only known azhdarchid from North America back then and because they had limited inf
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