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Calculate the pH of 560. mL of a 0.483-M solution of hydrofluoric acid before and after the addition of 0.125 mol of potassium fluoride.
pH befor addition = __________
pH after addition = __________
Calculate the amount of hydrated sodium thiosulfate necessary to make 500mL of 0.025 M solution (remeber that the water molecules are included in the molecular weight of hydrated compounds.
If the flotation cost is 15% of the issue's gross proceeds, what is the cost of external equity, re?
Calculate the molar mass of an unknown solid (assume a non nonelectrolyte) if 1.35 grams of the solid was dissolved in 15.0 grams of dodecanol and caused a freezing point depression of 2.34 degrees Celsius.
calculate the empirical formula of hydrated ferrous ammonium sulfate feanh4bso4ch2od from the following data.a. 0.7840
The vapor pressure of the water at 16 degrees C is 14 mmHg; CaCO3(s)-->CaO(s)+CO2(g): a) what is the partial pressure of the CO2 gas? b) How many moles of CO2 gas were in the CO2 gas sample
A sample of a gas in a piston/cyclinder apparatus occupies 33.1 mL at 1.14 atm and 23.3°C. If the volume of the sample is increased to 77.4 mL and the temperature changes to 39.9°C, what is the new pressure, in atm, of the sample
Nitrogen dioxide reacts with water to produce oxygen and ammonia: Using the ideal gas law equation, calculate the grams of NH3 that can be produced when 3.70 L of NO2 react at a temperature of 415 Celsius and a pressure of 705 mmHg
calculate delta H1 and delta H2 and heat capacities of the calorimeter plus salt solution.
Use the H NMR spectrum of the purified cyclic acetal to identify the major diastereomer From borohydride reduction. There are no minor diastereomers. Draw its structure including stereochemistry. Determine the ratio between major:minor.
A voltaic cell is built, using the anode reaction Cu (s)=Cu^+2(aq)+2e^- and the cathode reaction Fe^+3(aq)+1e^-=Fe^+2(aq). If [Cu+2]=.50M [Fe^+2]=.10 M and [Fe^+3]=.20 M, what will the Ecell be
For a given second-order reaction involving only one reactant, the concentration of the reactant at the beginning of the reaction is 0.065 M. If the reaction rate constant at 45*C is 0.040 M -1min-1, how much reactant should be left after 50.0 minu..
Determine the final concentration of each of the following solutions after 20.0mL of water has been added.
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