CaCO3⟶ΔCaO+CO2\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}CaCO3⟶ΔCaO+CO2
H2+O2→H2O\mathrm{H}_{2}+\mathrm{O}_{2} \rightarrow \mathrm{H}_{2} \mathrm{O}H2+O2→H2O
NaOH+HCl→NaCl+H2O\mathrm{NaOH}+\mathrm{HCl} \rightarrow \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}NaOH+HCl→NaCl+H2O
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