In the gas density method, the solid Potassium Chromate is first evaporated into a gas and then placed in a sealed container. The density of the gas is then measured at a certain temperature and pressure. Using the ideal gas equation PV=nRT, the molar mass of the gas can be calculated. ...
Samples from a colluvial soil rich in pyrogenic material (black C, BC) in north-west Spain were subjected to K2Cr2O7 and KMnO4 oxidation and the residual soil organic matter (SOM) was NaOH-extracted and analysed using analytical pyrolysis-gas chromatography-mass spectroscopy (Py-GC/MS) and ...
This result suggests that small nano-scale CuO and Ag2O/CuO catalyze the Diels-Alder reaction more efficiently than the oxidation of aldehydes. Figure 4. TEM spectra of different sizes of CuO. Figure 5. Mass spectrum of the Diels-Alder reaction product. Molecules 2008, 13 Figure 6. Product ...