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State the balanced net ionic equation for the reaction between MnO4- ion as well as Fe2+ ion in acid solution. Explain how to get this equation bc Fe is not higher that Mn on the reaction scale.
The second equivalence point was reached after 35.75mL of 0.1005 M hydrochloric acid was added to a 50.00 mL solution containing your sodium carbonate unknown., calculate the pH of the solution at the second equivalence point
The pressure gauge on a 20.0 m3 tank of nitrogen at 25 ?C reads 10 bar. Estimate the mass of nitrogen in the tank by : (a) Direct solution of the ideal gas equation of state. (b) Conversion from standard conditions.
A sample of nitrogen gas in a 4.7-L container at a temperature of 28°C exerts a pressure of 3.6 atm. Calculate the number of moles of gas in the sample.
Calculate the pH during the titration of 40 mL of 0.1M HCL with 0.1M NaOH solution after the following additions of base:
If silicon, atomic number 14, combines with chlorine, atomic number 17 what is the most likely formula based on your knowledge of the periodic nature of the elements
Three pure compounds are formed when 1.00 g samples of element X combine with, respectively, 0.472 g, 0.315g , and 0.944 g of element Z . The first compound has the formula X2Z3. What is the empirical formula for the second and third compounds.
A first order reaction A-> Product has a half-life of 19.8 min. What is the rate of the reaction when [A] = 0.632 M
A student following the procedure described in this module collected the foll wing data: Mass Mg, m= 0.0243, initial syringe volume, ml=1.0, final syringe volume,ml= 26.5, barometric pressure, torr= 754, temperature,k= 298. Calculate the gas law c..
Suppose that the microwave radiation has a wavelength of 12.4 . How many photons are required to heat 215 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
A certain anesthetic contains 64.9 percent C, 13.5 percent H, and 21.6 percent O by mass. At 120°C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g. What is the molecular formula of the compound
A stock solution is prepared by adding 15 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 10 mL of the stock solution?
Calculate the approximate molarity of this solution from the volume, percent composition, and density.
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