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The titration of 25.0 mL of 0.00 M base (B) by 0.500 M HCl for which the following data was collected. Volume of HCl added (mL) pH 0.0 11.11 20.0 9.43 25.0 9.25 30.0 9.08 40.0 8.65 50.0 5.28 60.0 2.04 What is the pKb value for the base (B) titrated?
The decomposition of nitrogen dioxide is a second-order reaction. At 550 K, a 0.250 M sample decomposes at the rate of 1.17 mol/Lxmin a). Write the rate expression?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 72.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 300.0 mL of solution. What is the molarity of the ethanol in this solution?
Organic Chemistry When assigning priority to R (clockwise) and S (counterclockwise) nomenclature of asymmetric carbon atoms, which has a greater priority CH3 or CH2CH3
in a reaction between pure acetic acid and sodium bicarbonate 11.2 grams of sodium bicarbonate was added to 21.0 ml of
From distribution studies, species M and N are known to have distribution constants between water and hexane of 6.01 and 6.20(K=?M?H2O/?H?hex). The two species are to be separated by elution with hexane in a column packed with silica gel containin..
During the late 1800's, hard rock miners replaced candles with carbide lamps for work in mine shafts. The lamps worked by dripping water onto calcium carbide that generated acetylene gas (H2C2) that was burned
Draw a molecular orbital picture for the pi system of each reagent in the [3+2] cycloaddition reaction of ozone with an alkene. Be sure to label the homo and lumo of each.
all of the common noble gases are monatomic and low-boiling. their boiling points in c are ne -245 ar -186 kr -152 xe
Gold has a face-centered cubic arrangement with a unit cell edge length of 4.08 \AA. How many moles of gold fit in a sheet with a length of 51.6 nm, a width of 24.3 nm
a 27.90 g piece of iron and a 28.50 g piece of gold at 100 degrees c were dropped into a 650.0 ml container of water at
If a certian mixture of olive oil and vinegarhas a total mass of 397.8g and a total volume of 4228 cm^3, what is the volume of oil and what is the volume of vinegar in the mixture?
After all reactions of consequence occur and equilibrium is established, solubility for CaCO3 in this system is much less than solubility for CaCO3 in water even though this system is considerably more acidic than the CaCO3/water system.
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