December 2021 0 7 Report
СРОЧНО! Какой объём займёт при н.у. ацетилен C2H2, получаемый из технического карбида кальция CaC2, массой 2,5 кг массовая доля примесей в котором составляет 25%.
CaC2+2H2O=Ca(OH)2+C2H2
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