как решиь: AgBr=Br2+? , ?+H2=NaH, ?+N2=Ca3+N2, HBr=Br2+?, Cu+?=CuO, HgO=Hg+?, ?+N2=NH3,...

Question

как решиь: AgBr=Br2+? , ?+H2=NaH, ?+N2=Ca3+N2, HBr=Br2+?, Cu+?=CuO, HgO=Hg+?, ?+N2=NH3, N2?=NO, ?+O2=CaO, HI=H2+?

Answer 1

2AgBr=Br2+2Ag

2Na+H2=2NaH

?+N2=Ca3+N2- не понятно

2HBr=Br2+H2

2Cu+O2=2CuO

2HgO=2Hg+O2

3H2+N2=2NH3

N2+O2=2NO

2Ca+O2=2CaO

2HI=H2+I2