The determination of molar mass and molar mass distribution is a very important part of polymer characterization. Many experimental methods, including LLS, have been developed and routinely used for this purpose. The absolute methods include end-group chemical analysis, vapor pressure osmometry, membrane...
No abstract is available for this article.doi:10.1002/chin.198005014KVANDEH.WILEY‐VCH Verlag GmbHCheminformKvande H. (1979) Determination of the average molar mass of the vapor above molten sodium chloride by the transpi- ration method. Acta Chem. Scand. A33, 407-412....
摘要: The SEC and VPO behaviour of hydroxyl-terminated polybutadiene resins was investigated using toluene as solvent and polybutadiene and polystyrene as standards. The results show that molar mass obtained depend on the nature of the standards used in the calibration, specialy in SEC analysis....
We are familiar with the pressure (P), volume (V), temperature (T), and number of moles (n) of gas in the Ideal Gas Law equation but the molar mass of the gas can also be calculated from the same equation. Like any other calculations with the molar mass...
A common application of this equation is to vapor–liquid equilibrium at low pressures, where the vapor can be considered to be an ideal gas mixture and all pressure corrections can be neglected. This leads to the simple equation, (58)xiγi(T,x)Piυap(T)=yiP relating the compositions of...
The procedure to use the molar mass calculator is as follows: Step 1:Enter the chemical compound in the respective input field Step 2:Now click the button “Calculate Molar Mass” to get the result Step 3:Finally, the molar mass of the chemical compound will be displayed in the new window...
(This is a mass-mole conversion.) NOTE: According to the balanced chemical equation, the number of moles Mg(s) that react is equal to the number of moles H2(g) produced. (4 points) 3. Calculate the pressure of the H2(g) in the tube. P is the pressure value in mmHg....
Noun1.gas constant- (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole universal gas constant,R natural philosophy,physics- the science of matter and energy and their interactions; "his favorite subject wa...
small amount of water vapor present just above the surface (vapor pressure), which must be accounted for. Accounting for this small quantity of water vapor requires using Dalton’s law of partial pressures: O H gas Total P P P 2 + = (Equation 2) Since the gaseous sample is collected o...
Or simply concentration could be expressed in units of mass per volume (i.e., g/L, mg/L). We can divide the substances that dissolve in water into two broad classes, electrolytes and nonelectrolytes. An electrolyte is a substance that dissolves in water to give ions that make the ...