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Calculate the pH of the solution when 0.050 mmol of a strong acid (such as HCl) is added to 100.00 mL solution of 0.0200 M lactic acid plus 0.0800 M sodium lactate. (CH3CHOHCOOH, Ka = 1.38 x 10-4)
A sample of pure NO2 is heated to 338 degrees C at which temperature it partially dissociates according to the equation
A sealed flask contains 0.45g of water at 28 °C. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask?
to what temperature will a 50.0 g piece of glass raise if it absorbs 5275 joules of heat and its specific heat capacity
Estimate the molar heat of vaporization of a liquid whose vapor pressure doubles when the temperature is raised from 85 ºC to 95 ºC.
Calculate Qsp for calcium fluoride (Ksp=3.9x10^-11) when 195.0 mL of a 0.00780 M solution of Ca(NO3)2 is added to 175.0 mL of a 0.00740 M solution of KF
Determine the collision frequency and mean free path for neon at 273 K and 0.113 MPa. The molecular mass of neon is 20.183 kg/kgmole.
A mixture, weighing 6.000 grams, contains 41.50 % Na3PO4 and 58.50 % BaCl2 of the mixture, by weight. When dissolved in water, a precipitate forms via the double displacement reaction:
Assume a negative binomial model with α = 2, and also assume that these steps will be followed by assembly and test. The combined assembly and test steps have a yield of 95%.
The case study will include a Synopsis and three Findings of Fact. Each Finding of Fact will require a justified recommended solution. Students should support their recommended solutions with rational thought learned from the course material
What is the role of sodium sulfite? How does it work? Please use an equation to explain this. Why was the work-up step so important in this experiment? What can be found in the top layer, and the bottom layer in the extraction step?
To find the pKa of X-281, you prepare a 0.087M test solution of X-281. The pH of the solution is determined to be 2.40. What is the pKa of X-281?
aqueous solution has an osmotic pressure of 6.35 torr at 23.1 C. What is the molar mass of the protein.
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