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2. 2K + H2SO4 -----> K2SO4 + H2
3. K2O + H2SO4 -----> K2SO4 + H2O
4. 2KOH + SO3 -----> K2SO4 + H2O
1. Ca(OH)2 + 2HBr ----> CaBr2 + H2O
2. Ca + 2HBr ----> CaBr2 + H2
3. CaO + 2HBr ----> CaBr2 + H2O
4. Ca + Br2 ----> CaBr2
Myśle że pomogłem
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