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A 55.0 mL solution of 0.155 M iron (III) perchlorate is prepared. This solution is then titrated with 27.6 mL of 0.250 M potassium hydroxide. What is the concentration of iron (III) perchlorate that
What is the hydronium ion concentration of a 0.500 M acetic acid solution with Ka = 1.8 x 10-5? The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H2O(l) <---> H3O+(aq) + CH3CO
If 57.0 g of B2O3 is added to 44.7 g of Cl2 and 68.8 g of C, what is the theoretical yield of boron trichloride?
Calculate the minimum weight of anhydrous MgSO4 needed to absorb a hypothetical volume of 0.074 mL of residual water from a wet caffeine/dichloromethane.
Caffeine has a distribution of 4.6 between water and dichloromethane. Calculate how much caffeine (I used 0.5283g of caffeine) is extracted per each 6ml dichloromethane extraction.
Briefly discuss the importance of the principles of solubility and miscibility when choosing extraction solvents
What are the highest and lowest possible energy of a photon that can be emitted by a hydrogen atom
The concentration of A was 0.30 M after 23 seconds. What was the initial concentration of A. Assume the stoichiometric coefficient for A is 1.
Describe how a cation exchange resin and a solution of NaOH with a known concentration could be used to determine the amount of NaCl in an aqueous solution
The product is a cyclopentyl ether (five carbons with an oxygen). Then attached to a carbon directly adjacent to the oxygen is a methyl bromide group.
Thallium has an average atomic mass of 204.3833 u. It has two naturally occuring isotopes, 203Tl (with a mass of 202.9723 u) and 205Tl (with a mass of 204.9745 u). Find the percent abundance of the
Fluorine has an average atomic mass of 18.998403 u, and chlorine has an average atomic mass of 35.453 u. How many grams of chlorine contain the same number of atoms as 1.00 g of fluorine
How many grams of silica were in a 6.00 grams sample, if it took 34.1 mL of 0.95 M HCl to react with all of calcium carbonate
Lanthanum has two naturally occuring isotopes. 0.089% of lanthanum atoms are 138La and the rest are 139La. Estimate the average atomic mass of lanthanum, to the nearest tenth of an atomic mass unit.
draw the newman projection of butane along the C2-C3 bond where the dihedral angle between the two methyl groups is 60
The following solutions are mixed: 35.0 mL of 0.200 M Ca(OH)2 are mixed with 60.0 mL of 0.125 M HBr. What is the pH of the resulting solution. Assume additive volumes.
Propanoic Acid, HC3H5O2, is a weak acid. A 0.125 M solution of propanoic acid, HC3H5O2, dissociates 1.020%. Using this information, calculate the pH of the 0.125 M solution of propanoic acid.
what fraction of the day's energy does walking one hour represent? How many kilograms of water would have to be evaporated if this were the only means of heat loss. (The heat of vaporization of wate
To what volume should you dilute 45mL of a 12M stock HNO3 solution to obtain a 0.121M HNO3 solution
Acid halides and Acid anhydrides can also be used to make esters - show how ethyl ethanoate can be made from a) and acid halide and b) an acid anhydride
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 2.00 kJ·s-1·m-2. If the sunlight consists of photons with an
How many grams of IBr were initially put into the vessel and determine the equilibrium constant - How many grams of IBr were initially put into the vessel?
How many moles of sodium chloride are present in the original solution. How many moles of ammonia are present originally