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1) 7
2) 8
3) 9
4) 10
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1) ЭН
2) ЭH2
3) ЭH3
4) ЭH4
5) ЭH5
Вариант 7
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1) 36,9%
2) 63,6%
3) 30,4%
4) 46,7%
5) 25,9%
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1) сера имеет жёлтый цвет
2) в состав молекулы сероводорода входит сера
3) в соединениях сера может проявлять валентность, равную 2, 4 и 6
4) массовая доля серы в серной кислоте равна 32,6 %
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1) CH4, NH3, H2O
2) H2O, NH3, CH4
3) NF, HCl, HBr
4) HBr, HCl, CH4
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1) 2
2) 3
3) 4
4) 5
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1) K2O, Cr2O3
2) CaO, Mn2O7
3) ZnO, CO2
4) Li2O, SrO
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1) магнием и щелочами
2) углеродом и основными оксидами
3) магнием и углеродом
4) щелочами и основными оксидами
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1) MnO2
2) Mn2O3
3) MnO
4) Mn2O7
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