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UNIVERSO ACQUA
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L'acqua ? un composto di idrogeno H e ossigeno O Per ogni grammo di idrogeno ci sono 8 grammi di ossigeno (1 atomo O pesa quanto 16 atomi H)ogni atomo di ossigeno ? legato a 2 atomi di idrogeno a formare la molecola H2OI 3 atomi sono tenuti assieme da legami covalenti?i nuclei degli atomi O e
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UNIVERSO ACQUA
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