October 2021 2 14 Report
Какие вещества простые, а какие сложные? 1) Na2S 2) H2SO4 3) ZnSO4 4) Fe2O3 5) BaCl2 6) HCl 7) CuO 8) Ca0 9) Mg 10) MgO СРОЧНО! В ТЕЧЕНИИ 10 МИНУТ!
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