Complete and balance each of the following half-reactions (steps 2–5 in half-reaction method):

(a) Cr2+(aq)⟶Cr3+(aq)
(b) Hg(l)+Br−(aq)⟶HgBr42−(aq)
(c) ZnS(s)⟶Zn(s)+S2−(aq)
(d) H2(g)⟶H2O(l (in basic solution)
(e) H2(g)⟶H3O+(aq) (in acidic solution)
(f) NO3−(aq)⟶HNO2(aq) (in acidic solution)
(g) MnO2(s)⟶MnO4−(aq) (in basic solution)
(h) Cl−(aq)⟶ClO3−(aq) (in acidic solution)

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

let that person have a turn to speak : )