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Question - To enter your answers in the scientific format use the exponential "E" notation to represent "times ten raised to the power of", followed by the value of the exponent. Example: 0.032 or 3.2 x 10-2 would be 3.2E-02 where "E" stands for (x 10y).
a) What is the concentration of a lactic acid buffer (pKa= 3.9) that contains 4.201 M of CH3CH(OH)COOH and 4.201 M of CH3CH(OH)COO-? Give your answer using 2 decimal points.
b) What is the pH? (Give your answer using 1 decimal point.)
Use the van der Waals equation of state to plot the compressibility factor, Z, against P for methane at 180K and 250K. Hint: calculate Z as a function of V/n and P as a function of V/n, and then plot Z Vs. P.
A beaker has a mass of 85.6 g when empty and 110 g when it contains 38.7 mL of pentane. What is the density of pentane
Use a solubility table to predict which of the following combinations of ions would produce a precipitate for the following and write complete net ionic equation for each reaction.
The water sample has a phenolphthalein alkalinity of 3.0 e -5, a pH of 10 also a bicarbonate ion concentration of 1.0 e -4 M. Define what is the total alkalinity in moms/L
A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile's engine cooling system. If your car's cooling system holds 5.20 gallons, what is the boiling point of the solution
the concentration of carbon monoxide in a sample of air is 9.2 ppm. there are how many molecules of CO are in 1 liter of 755 torr and 23 degrees celcius
determine the limiting excess reagent amp percent yield of the reaction.aspirin acetylsalicylic acid c9h8o4 can be made
Pretend you have been charged witht the task of analyzing a pure, colorless, unknown liquid. Would this liquid be capable of absorbing electromagnetic radiation. Why or why not
A patient being treated for thyroid cancer is to receive a dose of iodine-131. The typical dose is 4.5 μCi/kg of body weight. How many microcuries (μCi) will be administered to a patient weighing 61.0 kg?
How would you prepare 1.0L of an aqueous solution of sodium chloride having an osmotic pressure of 29atm at 27 degrees celsius. How many grams of NaCl are necessary
Explain the Kinetic Molecular Theory and describe how it helps us understand the phases of matter and behavior of gasses.
We a lot specify distance in terms of time: Chicago is 3 hours away or Bloomington is an hour away. Explain what do we mean by that. Ligt takes 500 seconds to get to earth from the sun. Explain how far is the sun
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