A:3CuS+8HNO3==3Cu(NO3)2+2NO↑+3S↓+4H2O
B:3Cl2+6KOH==5KCl+KClO3+3H2O
C:3H2O2+2KCrO2+2KOH==2K2CrO4+4H2O
D:3CCl4+K2Cr2O7==2CrO2Cl2+2COCl2+2KCl
—Our class will have a party the evening of June 30th. Would you like to come? —Yes, I'd love to, but I'm going to visit my grandparents in Dalian.