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The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.48. Compute the pH at each of the following points in the titration of 50.0mL of a 0.80 M B(aq) with 0.80 M HCL(aq).
Dinitrogen tetroxide (N2O4) dissociates via the reaction: N2O4 (g) ? 2NO2 (g). 3.00 × 10-2 mol N2O4 (g) is introduced into a 1.000L flask. At equilibrium, 2.36 × 10-2 mol N2O4 (g) remains. What is the equilibrium constant for this reaction?
A gas was enclosed in a rigid-walled container. The initial temperature and pressure were 52°C and 0.55 atm, respectively. If the final pressure were 2.41 atm.
calculate the moles of calcium carbonate present in a 25.00 ml sample of standard assuming the standard is known to
calculate w.Part B If the temperature of 347g of water is increased by 22.7K , calculate q.Part C If the temperature of 347g of water is increased by 22.7 K, calculate Delta H.Part D If the temperature of 347g of water is increased by 22.7K , calc..
A certain carbon-hydrogen compound contains 89.94% C by mass and the remainder is hydrogen. What is the empirical formula
Suppose 5.00g of helium gas is added to a 1.00L balloon containing 1.00g of helium gas, define what the new volume of the balloon is
canadian 10cent and 25cent coins are made of pure nickel which has a density of 8.902 gcm3. suppose each dime weighs
Carbon from the most recent remains of an extinct Australian marsupial, called Diprotodon, has a specific activity of 0.61 pCi/g. Modern carbon has a specific capacity of 6.89 pCi/g. How long ago did the Diprotodon apparently become extinct? Answe..
Arrange the members of the following set of elements in order of increasing first ionization energies. (Use the drop down lists to indicate your choice, with 1 as the smallest IE and 6 as the largest IE.)
The density of a human body can be approximated by the density of water, which is equal to 1.000 x 103 kg/m3. What volume will a 185 lb person occupy in liters
if a 2.6 reaction vessel initially contains 725 of cyclopropane at 485 how long will it take for the partial pressure
why is it best to cool the crucible and lid (and sample) in a desiccator rather than on the laboratory bench
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