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A sample of pure CaCO3 weighing 0.2500g is dissolved in hydrochloric acid and the solution diluted to 250.0ml in a volumetric flask. A 25.00ml aliquot requires 40.11ml of an EDTA solution for titration. Calculate the titer of the EDTA solution in terms of mg of CaCO3/ml of EDTA.
What is the mass percentage of iron in a sample if titration of 1.2284g of the sample requires 57.91 mL of .1018M of Ce(NH4)2(NO3)6 for complete reaction?
Sulfur Dioxide reacts with oxygen to produce Sulfur trioxide in the presence of a catalyst. In an experiment carried out at 727 degrees Celsius
Is imidazole an aromatic compound? Explain. Remember to account for non-bonding electrons on the nitrogen atoms. Which nitrogen atom is more likely to be protonated in an acid solution?
Calculate the quantity indicated for each of the following electrolyses. Enter scientific notation as 1.23E4. (a) [Cu2+] remaining in 5.70E2 mL of a solution that was originally 0.412 M CuSO4, after passage of 3.50 A for 289 s and the deposition o..
The molar mass of cellulose is approximately 6.0 x 105 g/mol and the molar mass of a soluble starch is on the order of 4.0 x 103 g/mol. The monomer unit in both of these molecules has the emperical formula C6H10O5
The vapor pressure of methanol at 30. oC is 158 torr. What mass (in grams) of methanol actually evaporates?
Give a definition of the ?outer. Explain what structural features of the solvent contribute to the value of this term.
If the pH of a solution is 4.2 (at 25 degrees C) what is the hydronium and hydroxide ion concentrations, and the pOH of the solution
Compare the structure of propranolol with noradrenaline and identify which features are similar in both molecules. Suggest why this molecule might act as an antagonist rather than an agonist
Determine the configuration (in the form t2g x egy or ext2y, as appropriate), the number of unpaired electrons, and the ligand-field stabilization energy in terms
A gas sample in a piston assembly expands, doing 588 kJ of work on its surroundings at the same time that 372 kJ heat is added to the gas.
When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface?
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