Осуществите превращения:
1) SO3 → H2SO4 → FeSO4→ Fe(OH)2→Na2[Fe (OH)4
2) Са → СаС2 → С2Н2 → С2Н4 → С2Н5О
3)Al →Al4С3→ СН4 → СН3Cl → С3Н8 → CO2
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