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Problem- A beaker with 1.60*10^2mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.20mL of a 0.450M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
State your answer by means of three significant figures.
Wind energy; Are there any by-products (positive as well as negative) created in the energy production? Are there limits to how the energy could be used (transportation, heating, etc)
how can you tell when the hydrolysis of starch is complete? Why does the test work this way? What is the monosaccharide that results at the end?
What is the literature melting points for borneol and isoborneol. What would be expected for the melting point range of a mixture of the two isomers.
Question- Activation of Hageman factor (X11), by negatively charges surfaces, bacterial LPS, enzymes will lead to the activation or the formation of the following inflammatory mediators except- Anaphylatoxin (C3a, C5a) from complement activation C..
If the colder block originally weighed 200g and the warmer one 100g, calculate the final temperature and the entropy change of the universe for this process.
Question- One-hundred milliliters of 1.75 mM NaCl is mixed with 80.0mL of 3.20 mM MgCl2 at 20 degrees Celsius. Calculate the osmotic pressure of each starting solution and that of the mixture, assuming that the volumes are additive and that both s..
near the triple point t273.15k the vapor pressure of ice is given by lnp -5924t 2.72lnt-0.0072t 9.912 where p and t
Determine the volume of NaOH solution needed to prepare 26.2 grams of Na3PO4. The NaOH solution is 12 percent NaOH by mass and has a density of 1.333 g/mL
how does the first ionizaiton energy of the alkali metal in a given period compare with the first ionization energy of the halogen in the same period. what is the result in terms of how these elements tend to react with each other
Problem- A solution of 500 uL 8M urea is added to 15.5 mL of aqueous protein solution. What is the final concentration of urea
Explain how long will it take in seconds for the water to reach boiling. At approx. Define what time does the water first begin to boil. Compute q for water and the pan and remember density
Is it possible for a fluorescent material to emit radiation in the ultraviolet region after absorbing visible light
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