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What is the pH of a buffer solution prepared from 5.15g of NH4NO3 and 0.10L of 0.15M NH3? What is the new pH if the solution is diluted with pure water to a volume of 500mL
Calculate the pH of each of the following buffered solutions. to 1.00 L of each of the four solutions. (a) 0.100 M propanoic acid (HC3H5O2, Ka= 1.3 10-5) (b) 0.100 M sodium propanoate (NaC3H5O2)
The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC. In a secondary turbine, the steam is expanded to 10kPa.
For a given reaction, ?H= -19.9 kJ/mol and ?S= -55.5 J/K-mol. The reaction will have ?G=0 at what temperature? Assume that H and S do not vary with temperature.
determine the minimum concentration of the percipitation the cation from the solution of the left. 0.035 M BaNO3; Naf.
The zinc content of a 1.23 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH. Zn+2HCl-->ZnCl2+H2
The average person generates about 2500 Kcal of heat a day. How many kilowatt-hours of energy is this? If walking briskly dissipates energy at 500 W, what fraction of the day's energy does walking one hour represent.
The cylinder diameter is 2 inches and the depth of the water in the cylinder is 4 inches. Determine the concentration of salt in solution, showing your answer in the units specified.
Student B's results are 8.4 g/cm^3, 8.8 g/cm^3, 8.3 g/cm^3. Compare the two sets of results in terms of precision and accuracy.
Methanol (CH3OH) can be made by controlled oxidation of methane. CH4(g) 1/2 O2(g) ? CH3OH(g) (a) Calculate ?H° and ?S° for this reaction. (b) Calculate ?G° at 298 K. (c) Calculate the temperature at equilibrium.
draw the major form of your drug whenph is low (acidic medium) for all acid base groups c. draw the major form of drug when ph is high (basic medium for all acid base groups
the osmotic pressure of the solution is 0.443 atm. What is the percent ionization of this acid? I got 20% but its wrong
Determine the energy of an electron in the given quantum level of each of the following ions. (Hint: Each of the ions has a different number of protons
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