3) _Na +
|H,80_ - _Na,304
_Na2SO4 + _H2

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.

1 a

2 d

3 a

4 c

explanation:

the atomic mass is the bottom number on the element.

-steel jelly

i think the answer is terrae but not 100 percent sure. ▓▬▬ §