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In the microscale oxidation of a Xylene to a Phthalic Acid, 825 mg potassium permanganate, 100 mg sodium carbonate, 3 mL water were put in flask and warmed then 125 microliters of unknown xylene and 10 mg detergent were refluxed for 45 minutes. Then we added sodium bisulfite until the purple color was gone for one step. What is the role of sodium bisulfite in such a procedure?
If a gas sample of a given size is moved into a larger container, the gas will expand to fill the container completely. What does this behavior imply about the attractive forces between gas particles?
What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
A 460 mL sample of oxygen (O2) was collected by displacement of water at 24 ? C under a total barometric pressure of 1095 torr. What mass of dry oxygen was collected? The vapor pressure of water at 24 ? C is 22 torr
What is the pH at the half-stoichiometric point (half-way to the endpoint) for the titration of 0.22 M HNO2(aq) with 0.10 M KOH(aq)?
Assume that no heat is lost to the surroundings or to the coffee cup itself. Assume that the mass of the solution is equal to the mass of the water.
The net charge of a polypeptide at a particular pH can be determined by considering the pK value for each ionizable group in the protein
A 1.70-g sample of a large biomolecule was dissolved in 14.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
the atomic masses of 6Li and 7 Li are 6.0151 amu and 7.0160 amu. Calculate the neutral abundance of each isotope. The average atomic mass of Li is 6.941 amu
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 10.82 g of ethane is mixed with 62.90 g of oxygen.
Suppose that 23.2 mL of 0.410 M sodium chloride is mixed to 23.2 mL of 0.339 M silver nitrate. Determine how many moles of silver chloride would precipitate?
A gas temperature at 100C occupies a volume of 154 mL. What will the volume be for the same amount of gas at a temperature of 10C, assuming no change in pressure?
A thief plans to steal a gold sphere with a radius of 30.0 cm from a museum. If the gold has a density of 19.3 g/cm^3, what is the mass of the sphere?
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