Molar mass ratio

For very rough estimation, one can consider the cohesive energy/ molar mass ratio as... 

Raw Meal Mineralogical Composition Assuming that all the alumina is present as kaolin (2Si02 Al203 2H20), by means of simple stoichiometric calculations (molar mass ratios) it is possible to identify... 

REALITY CHECK According to the balanced equation, there is a 2 1 mole ratio of LiOH to CO2. There is about a 1 2 molar mass ratio of LiOH C02 (23.95 44.01). We should expect about the same mass of CO2 as LiOH, and our answer confirms this (1000 g compared to 920 g). 

The width of a molecular weight distribution can, because of Equation (8-47), always be described by the ratio of two molecular weight averages. The molar mass ratio ( polydispersity index ) Q is given as... 

With monomolecular substances, Q = 1 and (7=0. Molar mass ratios and molecular inhomogeneities can, of course, be defined as the quotients of other averages besides the number and mass averages. 

The width of the molar mass distribution increases with increasing Q and U. However, Q and U are not very sensitive to the distribution width for narrow molar mass distributions, as can be seen from Equation (8-48). Samples with different degrees of polymerization (or molar masses) but equal molar mass ratios have different standard deviations (Figure 8-6). Conversely, polymers with equal degree of polymerization standard deviations, but different degrees of polymerization, also have different molar mass ratios. In addition, it must be kept in mind that the standard deviation is a relative and not an absolute measure of the distribution width. To be an absolute measure of the distribution width, the fraction of material encompassed by the standard deviation must be independent of the width of the distribution. This... 

The only complication added by considering reactions in solution is the need to relate three variables, using Equation 3.2, rather than two variables using the molar mass ratio. Example Problem 4.9 shows how to approach these solution stoichiometry problems. 

Drug Selected Residue Relation ofResidue to Parent Drug Percentage of Dose Excreted as Residue Molar Mass Ratio (Parent Drug/ Residue) Correction Factor (CF)... 

Number of arms determined from the molar mass ratio between comb star and single-arm comb. Entry 6 of Table 21.5. 

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