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The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4), a monoprotic acid with Ka = 3.3 x 10^-4 at 25 degrees C. What is the pH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 480 mg of acetylsalicylic acid each, in 210 mL of water?
Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3pi r^3).
For the reaction: H2+ClO2 = 2 HOCl; K=0.0900; what us the concentration of (HOCl), at equilibrium if 0.0230 mol of H2 and 0.0230 mol of ClO2
Five different substances are given to you to be dissolved in water. Which substances are most likely to undergo dissolution in water
What is the pH of the solution halfway to the equivalence point. What is the pH of the solution at the equivalence point
Calculate the heat of formation, Hof, of pentane given that the Hof of H_2O(l) is -285.3 kJ mol-1 and Hof of CO_2(g) is -393.5 kJ mol-1
A person is exposed for three days to identical amounts of two different nuclides that emit positrons of roughly equal energy. The half-life of nuclide A is 18.5 days and the half-life of nuclide B is 255 days.
if 100 ml of 3m hcl is spilled on a lab bench, what is the minimum mass od sodium bicarbonate that must be used to neutralized the acid?
Suppose 50 mL of 0.250 M CoCl2 solution is added to 25.0 mL of 0.350 M NiCl2 solution. Calculate the concentration, in moles per liter, of each of the ions present after mixing.
A 1.00-mol sample of an ideal monatomic gas is compressed isothermally and irreversibly in one step from 2.50 atm to 6.50 atm at 300.0 K. Calculate G for this process
Many household cleaning products contain oxalic acid, H2C2O4, a diprotic acid with the following dissociation constants: ka1= 5.9*10^-2, ka2=6.4*106-5 Calculate the equilibrium concentration of HC2O4^- in a 0.20 M solution of oxalic acid.
consider the combustion reactionch4 g 2o2 g co2 g 2h2o lis this an exothermic reaction?if 100g of natural gas ch4 is
How many molecules of carbon dioxide are produced when 149 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water?
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