Hydrogen reservoir concentrations

The reservoir gas in a wet gas reservoir has a specific gravity of 1.295, a hydrogen sulfide concentration of 20.9 mole percent, and a carbon dioxide concentration of 44.7 mole percent. Determine a value of z-factor for use at reservoir conditions of 5720 psig and 268°F. 

The side reactions, the oxidation of acetone by Cr" , which occurs if the medium is acidic, and the slow decomposition of ferrocene in acidified solutions of acetone, were overcome by reaction of a solution containing both Cr and ferrocene but no perchloric acid in one reservoir of the stopped-flow apparatus with a solution of perchloric acid in aqueous acetone. The above reaction takes place much more rapidly than either of the side reactions. The oxidation rate is dependent on hydrogen-ion concentration, and allowance has been made for the small amount of HgCrOi present in the solutions ... 

The solubility (or insolubility) of different vitamins is of concern in nutrition. Molecules of vitamins B and C contain several —OH groups that can form hydrogen bonds with water (Figure 10.3). As a result, they are water-soluble, readily excreted by the body, and must be consumed daily. In contrast, vitamins A, D, E, and K, whose molecules are relatively nonpolar, are water-insoluble. These vitamins are not so readily excreted they tend to stay behind in fatty tissues. This means that the body can draw on its reservoir of vitamins A, D, E, and K to deal with sporadic deficiencies. Conversely, megadoses of these vitamins can lead to very high, possibly toxic, concentrations in the body. 

An example of the combined use of ozone, hydrogen peroxide, and carbon filtration is seen in the operation of water plants located from the South and East of England to the North of London. Croll [220] presents a detailed explanation on the performance of such plants that supply the drinking water for a population of more than 3.6 million inhabitants. Water in reservoirs can have concentrations of 0.53 and 0.31 pg L-1 of atrazine and simazine, respectively. 

Example 6-1 The reservoir of a photoreactor is filled with 0.9 m of wastewater, and 15 L of 35% H2O2 solution are added. Calculate the initial concentration of hydrogen peroxide at a temperature Tof 25 °C. 

Many of the important characteristics of the atmosphere are related to the concentrations of particular molecular species, such as O2. Here the absolute abundances of carbon, nitrogen, and hydrogen (as H2O) as supplied from the mantle are considered in the context of models of noble gas degassing from the solid Earth. A convenient reference for comparing surface volatile inventories to mantle reservoirs is obtained by dividing the surface volatiles into the mass of the upper mantle, the minimum size of the source reservoir. However, this should not be taken to imply a particular model of degassing. 

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