Укажите степень окисления вr: br2o hbro3 kbrf4 brf5 cabr2

1-(+1); 2-(+5); 3-(+3); 4-(+5); )

2h3aso3+kmno4+h2so4=h3so4+mnso4+2k2so4+h2o

fe(iii)2 o(ii)3

fe(ii) o(ii)

pb(vi) o(ii)3

mn(iii)2 o(ii)3

n(ii) o(ii)

n(iii)2 o(ii)3

s(iv) o(ii)2

cr(vi) o(ii)3

h(i) cl(i)

n(iii) h(i)3

al(iii) cl(i)3

ba(ii)3 p(iii)2