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A solution of dimethylamine/dimethylammonium buffer contains 0.246 M (CH3)2NH and 2.09 M (CH3)2NH2Cl. Calculate the pH of the solution. Round your answer to 3 significant digits. Kb= 5.1x10^-4 (CH3)2NH(aq) + H2O(l) = (CH3)2NH2+(aq) + OH-(aq)
what volume of dry H2 gas would theoretically be produced if it is measured at 20 degrees Celcius and 785 mmHg?
What is osmium's molar capacity if the two substances reach thermal equilibrium at 100 degrees Celsius? Osmium, the densest known metal, has a density
Calculate the freezing point and boiling point of a soultion of 383g of glucose dissolved in 400. g of water.
If water had not been added to your initial product, what error in the percentage magnesium determined would have resulted(that is if the part of the product has been magnesium nitride)? Explain.
Calculate the pKa value of the acid and determine the number of moles of acid initially present. When the reaction is complete, what is the concentration ratio of conjugate base to acid? How many moles of strong base were initially added
What is the de Broglie wavelength of a flea midway through its jump? Assume the mass of the flea is4.50×10-4 g and t is moving at 1.00 m/s.
Initially a container contains 0.46 M HI and no product. What is the equilibrium concentration of H2
helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory
To determine the molar mass of an unknown protein, 1.00 mg was dissolved in 1.00 mL of water. At 25.0°C the osmotic pressure of this solution was found to be 1.47 × 10-3 atm.
Calculate the heat required to raise the temperature of 125 g of water are heated from 20.0oC to 100oC based on a specific heat of water of 4.184 J/g oC.
What is the molarity of a nitric acid solution if 43.53 mL 0.1000 M KOH solution is needed to neutralize 20.00 mL of the acid solution
What will be the total volume of solution, in ml, when the concentration of 175.0 ml of 0.100 M K3PO4 solution is decreased to 0.012M
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