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The difference between PCC and chromic anhydride. are they the same reagents? how are they different? what is the mechanism like? does the oxygen on the substrate attach the chromium in both cases? how exactly does the water form, i know that the H came from the alcohol and OH from PCC, but how does the arrow pushing work?
Calculate the enthalpy change of the reaction for per mole potassium carbonate. Assume the specific heat of all solutions are 4.18 J/g°C and all solutions have a density=1.0 g/ml (A:-13.3 KJ) show all calculations please
For a particular sample of copper, two peaks were obtained in the mass spectrum,showing an abundance of 69.10% at m/e 63 and 30.90% at m/e 65. Calculate the relative atomic mass of this sample of copper to three significant figures, using the data g..
If the barometric pressure is 784 torr and the experiment is carried out at 25 oC, what is the pressure of the gas collected?
iron is converted to Fe^2+ ions only and no Fe^3+ ions are formed. 25.0cm3 of the solution were acidified and titrated against a 0.0185 mol/dm^3 solution of potassium dichromate (VI). The volume required was 31.0cm^3. Calculate the percentage of i..
An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1nm. What is the value of n for the level to which the electron relaxed
Calculate the pressure of oxygen for a system in equilibrium in which [NH4+] = [NO3-] at pH 7.00
Methane is burned in a Laboratory Bunsen burner to give CO2 and water vapor. Methane gas is supplied to the burner at the rate of 5.0 L/ min ( at temperature of 28° C and a pressure of 773 mm Hg)
What is the definition and units for atomic mass. What is the difference between molecular mass and nominal mass. Which one do we usually use
Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose that a can contains a residual amount of gas at a pressure of 770 mmHg and a temperature of 30 C
unknown substance in 30.0 g of cyclohexane was found to freeze at 3.1 degree celcius . what is the molar mass of the unknown substance?
In the reaction of Fe3O4 with carbon to form carbon dioxide and iron, the number of moles of carbon required to convert 23 g of Fe3O4 to products is
Determine the extent of reaction and amounts of B & Z and A reaction having time independent stoichiometry follows the equation
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