C-10-Q073mediumsingle_mcqZnO+C→Δ?\mathrm{ZnO + C \xrightarrow{\Delta} ?}ZnO+CΔ?aZn + CObZn+CO2\mathrm{Zn + CO_2}Zn+CO2cZnC+O\mathrm{ZnC + O}