Question

xf sulfuro plumboso + acido nitrico = nitrato plumboso + asufre + oxido nitrico + agua

Answer 1

 Pb S  +   HNO₃ ⇒   Pb (NO₃)₂  +   S  +   NO +    H₂O

3 Pb S  +  8 HNO₃ ⇒  3 Pb (NO₃)₂  +   3 S  +  2 NO +   4 H₂O