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If a solution of compound S (MW = 300) with a known ? of 40,000 at ?max of 360 nm gave an absorbance of 1.0 in a 1.00-cm cell, how many mg of compound S was present in 1.0 mL of the analyzed solution? (Show your calculations)
A solution of acid was found to have a hydrogen ion concentration of 0.03 mol dm-3 what is the pH of the solution?
What is the minimum concentration of Mg2+ required to begin precipitating Mg(OH)2(s) in a solution of pH 10.82? For Mg(OH)2
if 29.7mL of a .205 M KOH solution is required to completely neutralize 25.0mL of a solution of CH3COOH, what is the molarity of the acetic acid solution? CH3COOH(aq)+KOH(aq)>KCH3COO(aq)+H2O(l)
The rate of waste brine removal (Stream 6) 4.2. The rate of desalinized water (potable water) production (Stream 4) 4.3. The fraction of the brine leaving the osmosis cell that is recycled
Calculate the molarity of a solution made by adding 44.4 mL of concentrated ammonia (28% by mass, density 0.880 g/mL) to some water to some water in a volumetric flask
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
If the CO2 and O2 in the above reaction are measured at the same temperature and pressure, 1. How many milliliters of O2 are produced per minute. At what rate is the Na2O2 consumed, in grams per hour
What volume of 0.812 M HCl is required to titrate 1.45 g of NaOH to the equivalence point
What would be the advantages of the internal standard calibration method and explain why the technique works so well in GC
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 3.13 g of sweat?
Anfinsen studied the folding properties of the enzyme ribonuclease using the denaturants 2-mercaptoethanol and urea. How does each of these materials contribute to the unfolding of the protein,
What is the wavelength (in nanometers) associated with a photon which has an energy content of 5.34 x 10-22 kJ
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