anhsaolunglinh
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cân bằng các phương trình sau:
1. FeCuS[SUB]2 [/SUB]+O[SUB]2[/SUB] ---> Fe[SUB]2[/SUB]O[SUB]3[/SUB] +CuO +SO[SUB]2[/SUB]
2. Fe[SUB]x[/SUB]O[SUB]y[/SUB] +HNO[SUB]3 ---> [/SUB]Fe(NO[SUB]3[/SUB])[SUB]3 [/SUB]+NO +H[SUB]2[/SUB]O
3. FeS +Cus[SUB]2[/SUB] +HNO[SUB]3[/SUB] --->Fe[SUB]2[/SUB](SO[SUB]4[/SUB])[SUB]3[/SUB] +CuSO[SUB]4 [/SUB]+NO +H[SUB]2[/SUB]O
1. FeCuS[SUB]2 [/SUB]+O[SUB]2[/SUB] ---> Fe[SUB]2[/SUB]O[SUB]3[/SUB] +CuO +SO[SUB]2[/SUB]
2. Fe[SUB]x[/SUB]O[SUB]y[/SUB] +HNO[SUB]3 ---> [/SUB]Fe(NO[SUB]3[/SUB])[SUB]3 [/SUB]+NO +H[SUB]2[/SUB]O
3. FeS +Cus[SUB]2[/SUB] +HNO[SUB]3[/SUB] --->Fe[SUB]2[/SUB](SO[SUB]4[/SUB])[SUB]3[/SUB] +CuSO[SUB]4 [/SUB]+NO +H[SUB]2[/SUB]O