In the manufacture of nitric acid, ammonia and preheated air are mixed to form a gas containing 15.0 mole% nh3 at 600°c. after the blending process, the ammonia is catalytically oxidized to form no2, which is absorbed in water to form hno3. if ammonia enters the gas blending unit at 25°c at a rate of 520 kg/hour and heat is lost from the mixer to its surroundings at a rate of 7.00 kw, determine the temperature to which the air must be preheated.

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.

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