1. W wyniku reakcji chemicznej 30 g glinu z tlenem powstało 84 g tlenku glinu. Oblicz, ile gramów tlenu wzięło udział w tej reakcji chemicznej.
2. W wyniku rozkładu 46 g wody otrzymano 6 g wody i wodoru. Oblicz, ile gramów tlenu powstało w wyniku tej reakcji chemicznej.
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