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кг?...
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Помогите перевести текст "school in england"...
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а)Al + H2SO4= б)HNO3 + CuSO4= в)Al2(SO3)3 + H2SO4= г)NO2S + H2SO4=...
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А)Na=Na2O=NaOH+NaCl Б)S=SO2=H2SO4=K2SO4 В)Ca=CaO=Ca(OH)2=CaCO3 Г)Al=Al2O3=Al(OH)...
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