P
H2+O2-to->H2O
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Bắt tay cái,mk cùng chung cảnh ngộ.
Ca(OH)2+CO2--->CaCO3+H2O
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$CaO+H_2O---->Ca(OH)_2$ .
$CO_2+NaOH---------->Na_2CO_3+H_2O$
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$3Cl_2+6KOH \overset{t^{\circ}}{\rightarrow} 5KCl +KClO_3 + 3H_2O$