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A scientist measures the pH of some rainwater and finds that it is acidic.
Which pH corresponds with the acidic quality of the rainwater?
A-6
B-7
C-8
D-9

A) 6

Explanation:

this is because on the ph scale a number of 7 is used to represent neutral and a number lower than 7 is used to represent the strength of an acid and proves that it is acidic. However a number greater than 7 is used to represent a substance that is an alkali

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.