Answers edited by Valour J.
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25. A buffer is prepared by mixing picric acid and its conjugate base in a 2:1 ratio. The pH of the solution is measured as 0.079. What is the Ka of picric acid?
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Benhur is standing #200# feet from the base of a tall building. If he determines that the angle of elevation from the ground to the top of the building is #50# degrees, how tall is the building?
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Find the product?
-a*2 b*2 c *2(a + b - c)