NI(NO3)3+pbbr4nibr3+pb(no3)4
Your formulas are not correct.
PbBr4
If lead (II), then CoBr2(aq) + Pb(NO3)2(aq) ----> Co(NO3)2(aq) + PbBr2(s) If lead (IV), then 2CoBr2(aq) + Pb(NO3)4(aq) ----> 2Co(NO3)2(aq) + PbBr4(aq)
The chemical formula for Lead (II) Bromide is - PbBr2
It's Lead (IV)Bromide We use roman numerals when it's a transition metal + nonmetal