1. 4Na+O2=2Na2O
2. 4P+5O2=2P2O5
3. СхНу+О2=СО2+Н2О
4. 2Fe(OH)3=Fe2O3+3H2O
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Answers & Comments
1. 4Na+O2=2Na2O
2. 4P+5O2=2P2O5
3. СхНу+О2=СО2+Н2О
4. 2Fe(OH)3=Fe2O3+3H2O