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Calculate the pH at the equivalence point for the following titration: 0.10 M HCN versus 0.10 M NaOH. The Kb of CN- = 2.0 x 10-5.
consider a stone column 3.00 ft in diameter and 10.00 ft high. What is is mass in pounds if its density is 3.50 g/mL.
describe the appearance of the solution if drops of .01M AgNo3 had been added directly to the test solution and then centrifuged
Compute KP at this temperature If the pH of an aqueous solution is 8.23, what are the hydrogen- and hydroxide-ion concentrations of this solution?
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
what is the easiest way to identify the structure of a molecule from a H-NMR spectra?
You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample.
calcium and the human body normally contains 6 quarts of blood, what mass of calcium (in grams) will be found in the total blood volume?
What role do the potassium chloride (KCl) and potassium sulfate (K2SO4) play in this experiment
The activation energy for the formation of HCl from its elements: H2 (g) + Cl2 (g) → 2 HCl(g) is 155 kJ mol-1. How much faster will this reaction occur at 200°C versus at 100°C?
A sample of chlorine gas in confinedin a 5.9L container at 220. torr and 27 degrees Celsius. How many moles of gas are present in the sample?
A glucose solution contains 51.0 g of glucose in 475 g of water. What is the freezing point?
Suppose that 27 g of each of the following substances is initially at 29.0 C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat?
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