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What is the pH at the equivalence point when 20.0 mL of 0.20 M CH3NH2 is titrated with 0.40 M HCl? Kb = 4.4 × 10G4 for CH3NH2.
When equilibrium is reached at 700C, the total pressure of the system is found to be 4.00 atm. If the equilibrium constant Kp for this reaction is equal to 1.52,
how many moles of CO2 are produced when 5.40 mol of ethane are burned in an excess of oxygen
vitamin tablet contains 125 mg of vitamin C (C6H8O6). How many vitamin C molecules are contained in the tablet?
0.01M HCl reacts with 3.18 g Na2CO3. Here 50 mL of HCl is required for the reaction. Calculate the volume of CO2 produced at 273 K and 1 atm.
if you lived in the mountains where the atmospheric pressure is 685 mm Hg, what would the partial pressure of oxygen and of nitrogen be ?
Use the bond dissociation energies in Table 7.1 on page 219 (of your text) to calculate an approximate ?H° in kilojoules for the reaction of ethylene
Calculate the molar solubility of AgBr in a 1.00 M aqueous solution of ammonia. Then calculate the solubility of AgBr in pure water, and compare the two solubilities. (Ksp for silver bromide is 7.7x10 -13 and Kf for Ag(NH3)2+ is 1.6x10^7)
Calculate the capacity factor for decane on HP-1 column (25 m length, 0.25 mm I.D., 0.5 mkm film thickness) at 120 C. Explain.
Write a balanced chemical equation, including physical state symbols, for the combustion of gaseous methan into gaseous
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
How many total moles of ions are released when the following sample dissolves completely in water? 7.24x 10^20 formula units of NiCl2.
What is the Cl ? concentration just as Ag2CrO4 begins to precipitate when 2.0 M AgNO3 is slowly added to a solution containing 0.048 M Cl ? and 0.048 M CrO42-
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