Ответ:
4K+O2 → 2K2O
2Mg+O2 → 2MgO
6Na+3N → 2Na3N
2Al+3S → Al2S3
2Cr+O2 → 2CrO
H2+S → H2S
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Ответ:
4K+O2 → 2K2O
2Mg+O2 → 2MgO
6Na+3N → 2Na3N
2Al+3S → Al2S3
2Cr+O2 → 2CrO
H2+S → H2S