April 2021 0 17 Report
Сокращенное ионное уравнение реакции 2Н++SiO32—=H2SiO3↓ соответствует взаимодействию между:а) SiO2 u H2O; б) Na2SO4 u HCl; в) H2SO4 u SiO2; г) CaSiO3 u H2SO4   пояснить
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