Concentration percent

Combined SO2 represents the SO2 present as monosulfite plus, for the same reason, one-half of the SO2 present as bisulfite. All are expressed as percent concentration of SO2 in the Hquor, ie, g of SO2/100 mL of Hquor, in which the specific gravity of the Hquor is taken to be 1.0. 

Polypropylene Liners Polypropylene hners (Hercules Incorporated) are used in sulfuric acid service. At 10 to 30 percent concentration the upper temperature limit is 93°C (200°F). In the range of 50 to 93 percent concentration, this drops from 66 to 24°C (from 150 to 75°F). 

Sand that is used in filtration must be free of clay, dust, and other impurities. The ratio of lime, lime-stone, and magnesium oxide will have to be lower than 5 weight percent. The standard guide value of the quality of fresh sand is to be below 2% soluble matter at 20 °C within 24 hours in hydrochloric acid of a 20 weight percent concentration. 

If the ore consists of separate grains containing the desired material, it can be separated from undesired minerals by physical methods such as flotation, sedimentation, or magnetic separation. For metals this step can lead to 80 to 95 percent concentration of the value of the ore. Ceramic raw materials such as sand and clay can often be found pure enough in nature so that no concentration is needed. 

Concentration (weight percent) Concentration (weight percent)... 

FIG. 26-9 Maximum pressure as a function of volume percent concentration for methane in air in a 20-L test sphere. The initial temperature and pressure are 25°C and 1 atm. The stoichiometric concentration is 9.51% methane. [C. V. Mashuga and D. A. Crowl, Application of the Flammability Diagram for Evaluation of Fire and Explosion Hazards of Flammable Vapors," Process Safety Progress, vol. 17, no. 3 copyright 1998 American Institute of Chemical Engineers (AlChE) and reproduced with permission.]... 

When increasing amount of CO2 are introduced into an environment the rate and depth of a person s breathing increases. For example at 2 percent CO2 concentration, breathing increases 50 percent and at 10 percent concentration a person will gradually experience dizziness, fainting, etc. 

Procedure A standard calibration curve is plotted by thoroughly mixing together about 10% (w/w) of the analyte with the KBr-KSCN mixture and then grinding the same intimately. Now, the ratio of the thiocyanate absorption at 2125 cm-1 to a selected band absorption of the analyte is plotted against the percent concentration of the sample. Likewise, an identical disc is prepared with the unknown sample and the same KBr-KSCN mixture. Finally, its absorbance ratio is determined and the concentration (of unknown sample) is read off directly from the standard calibration curve. 

Some experiments on the hydrolysis of Composition B-4 were reported prior to this program (see Appendix C in Bonnett and Elmasri, 2001). Composition B-4 at 10 percent concentration was treated with 3 M (12 weight percent) caustic at 90°C in a total solution of 50 ml. However, the temperature was not well controlled and oscillated over about 10°C with a periodicity of approximately 10 minutes. The results were consistent with the observations made at HAAP ... 

Most frequently, volume data for solutions are tabulated as density p as a function of composition. The procedure for obtaining y i2 is illustrated by reference to the densities and weight percent concentrations of ethanol-water mixtures (Table 18.1, Columns 1 and 4 at 25°C). 

Factor Percent Concentration Variance Explained Percent Spectral Variance Explained... 

It is a colourless gas with sweet odour and taste, available as liquid under pressure. It produces analgesia without loss of consciousness in 1 to 2 percent concentration, in 6 to 8 percent it produces loss of consciousness while... 

Halothane causes relatively greater depression of respiration. It inhibits intestinal and uterine contractions. Cardiac output is also reduced by 20 to 50 percent when anaesthesia is induced by inspiration of halothane at 0.8 to 1.2 percent concentration, which is necessary for surgical anaesthesia. Heart rate is slowed during anaesthesia, tachyarrhythmias may also occur in the presence of halothane. 

Methyl alcohol is only used to denature ethyl alcohol in 5 percent concentration. It is metabolised to formaldehyde and formic acid by alcohol and aldehyde dehydrogenases. Its absorption and distribution are similar to ethyl alcohol. 

Flammable Limits in Air — The percent concentration in air- (by volume) is given for the lower (LFL) and upper (UFL) limit. The values, along with those for flash point and ignition temperature, give an indication of the relative flammability of the chemical. The limits are sometimes referred to as "lower explosive limit (LEL) and "upper explosive limit" (UEL). Chapter 3 provides a detailed technical explanation. 

The NTO/TNT formulation is characterized by a lower vulnerability than RDX/ TNT and Composition B. NTO is also used to produce pressed PBXs with thermoplastic binders and cast PBXs with thermosetting binders for IMs. NTO is an explosive with calculated performance near that of RDX but with insensitivity approaching that of TATB. Possible use of NTO is as an alternative to RDX in formulations where a lower sensitivity is desired or as an alternative to TATB where better performance is required without a large increase in sensitivity [123, 152, 153, 215]. The formulations based on NTO/binder (FPC-461, Viton-A, Kel-F800, Estane-5702 and Kraton G) in 95/5 (mass percent concentrations) have also been tested for compatibility and none of the NTO/binder formulations showed evidence of incompatibility. 

The same catalyst can be applied to higher concentrations of H2S. All the heat of reaction of H2S to form sulfur or SO2 is released in the Selectox reactor in the configuration of Figure 3 the outlet temperature approaches the maximum we think desirable with a 5 percent concentration of H2S in the feed gas. 

What is the percent concentration of commercial hydrochloric acid ... 

Table 6.5. Relative Sweetness of Sugars (Percent Concentration to Give Equivalent Sweetness).

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