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Iron pyrite, commonly known as "fool's gold," is 46.5% Fe and 53.5% S. A crystal of iron pyrite contains 4.24g of iron. A) Calculate the mass in grams of the crystal. B) How many moles of iron is in the crystal?
Given that the solubility product for La(IO3)3 is 1.0 x 10-11, what is the concentration of La3+ in a saturated solution of lanthanum iodate?
One of my pre-lab questions asks me to add one of two steps to the beginning of the mechanism for the reaction of benzopinacol with I2/HOAc to benzopinacolone to show the function of I2 in this rearrangment.
1.013-g sample of ZnSO4•xH2O is dissolved in an aqueous solution of BaCl2. The pure BaSO4 precipitate is filtered out of solution, dried, and its mass is determined to be 0.8223 g. What is the value of x in ZnSO4•xH2O?
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide.
hydrochloric acid to form benzoic acid, if 1.47 g of benzoic acid were formed, how many mmol of sodium benzoate would have been used?
For a 0.13 M solution of formic acid, HCOOH, the pH = 2.40. Calculate Ka for formic acid.
Consider the reaction H2(g) + I2(g) -> 2HI(g) delta G degrees at 298K = 2.60 kJ/mol. In an experiment the initial pressures are H2=4.26 atm, I2 = 0.024atm, and the HI =0.23atm Calculate A. Dellta G and B. predict the direction of the net reaction
A 15.0mL aliquot of KOH 0.300 M is added to 500.0 mL of a buffer solution that is 0.225 M in hypochlorous acid (HClO) and 0.333 M in sodium hypochlorite. What is the pH of the solution? The K of hypochlorous acid is 3.8*10-8.
Using your average value for Kc and the concentrations provided for the reactants, determine the absorbance expected when 16.00mL of Fe 3+ (aq) is reacted with 10.00 mL of SCN (aq).
The temperature of the calorimeter rose from 25C to 33.73C. If the heat capacity of the calorimeter was 9,630 J/C, what is the value of delta H for the combustion reaction in KJ/mol.
provide reaction mechanisms for the formation of each of these byproducts and specify whether the mechanisms you write are SN1, SN2, E1, E2, or none of these. explain why you would expect bisulfate to be a good leaving group for substitution or eli..
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