Which statement correctly describes the conservation of matter in a chemical reaction? a. different types of atoms may form during the change, but the total mass remains constant. b. the number of molecules is conserved, so the total mass does not change. c. different numbers of atoms may form during the change, but the total mass is unchanged. d. atoms of each element are conserved,  so the total mass does not change

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.

a corroding iron, if that's one of your choices