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En 250 g de H2S hi ha:
DADES: masses atòmiques H:1 S:32
7 mols de H2S i 6,02·1023 molècules de H2S
7 mols de H2S i 7 molècules de H2S
4,2·1024 mols de H2S i 7 molècules
7 mols de H2S i 4,2·1024 molècules de H2S
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