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What does 8/15 equal as a simplified fraction? You have 19g sample of ethanol with density of 0.7893 g/mL. What volume of ethanol do you have? Can somebody help me differentiate f(x)= (-x^2-1)/(x^2-1)^2 and get the answer as f''(x)= (2x^3 +6x)/(x^2-1)^3? 20000 usd converted to aud? Explain why C0 = [H+]∞ for the solvolysis reaction you carried out.?