80. Solving a chemistry problem

80. Solving a chemistry problem

1285. Complete the reactions characterizing the ratio of p-elements of group VI to some simple substances. Give a description of the resulting products; their relationship to water. Specify their areas of application.
1285. a) O2(g) H2(g) ... c) S(t) O2(g) ... b) Se(t) H2(g) ... d) S(t) H2(g) ...

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