Questions asked by Judy O.

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• 0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of solid sodium carbonate are dissolved in the same beaker of water, transferred to a volumetric flask and made to 250.0 mL. The Ka for HCO3 - is 4.7 x 10-11. What is the pH of the resulting buffer?
  
• How you would make 100.0 ml of a 1.00 mol/L buffer solution with a pH of 10.80 to be made using only sodium carbonate, sodium hydrogen carbonate and water? How much sodium carbonate and sodium hydrogen carbonate would you use?
  
• An amount of NO2 was initially put into a 5.0L flask. When equilibrium was attained according to the equation: 2NO (g) + O2 (g)--> 2NO2 (g), the concentration of NO was 0.800M. If Keq for this system is 24.0, what was the initial concentration of the NO2?
  
• What is N-(2,2,2-Trichloroethyl)carbonyl] Bisnor-(cis)-tilidine's functional group?
  
• If a typical molecule has #10^(25)# parts and someone wanted to artificially build them at a rate of a million parts per second, how long would it take to complete just one molecule? What is this problem called and why?
  
• Why is it hard to test the particle model to see if it is correct?