Describe the empirical formula for terephthalic acid
Terephthalic acid, used in plastics manufacture, contains only C, H, and O. Combustion of 19.81 mg of terephthalic acid sample produces 41.98 mg CO2 and 6.45 mg H2O. What is the empirical formula for terephthalic acid?
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Suppose we wanted to know if people get more nervous before flying in an airplane or taking a ship to their destinations. In other words, are people more afraid of falling from the sky or sinking in the ocean? Because stress levels vary a great de
Two ants race across a table 52 cm long. One travels at 4.72 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one? Answers in units of cm.
A common rule of thumb taught to engineers inthe recent past was that raising the temperature 10Cfor many reactions would double the reaction ratederive under what conditions this would be true.
A car slows down uniformly from a speed of 45 km/h to rest with an acceleration of -0.50 m/s^2. How long did it travel before coming to a stop? Give your answer in meters.
Let (X,Y) be jointly distributed random variables with joint density f(x,y)=1/9 for 0<=x<=3 and 0<=y<=x^2. Determine f(X=x given Y=2)
If you were monitring the titation by visivle spectroscopy, what wavelength would you select for the data analysis? Why? How would you determine the endpoint of the tittaion based on the the recored visible spectra rather than they eye.
How long is the rock in the air from the instant it is released until it hits the bottom of the hole ?
Let X be a continuous distribution with probability density function: f(x))=2/(x+3)^2 if x>= -2 and f(x)=0 otherwise. Let Y=X^2. Determine P(Y<=4)
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