1. Count The Number of Each Atom The first step to finding the molar mass of Tetrahydrofuran is to count the number of each atom present in a single molecule using the chemical formula, (CH3)2CHCHO: ElementNumber of Atoms C(Carbon)4 ...
There are 4 easy steps to find the molar mass of COHCH2CH2CH3 based on its chemical formula. 1. Count The Number of Each Atom The first step to finding the molar mass of Tetrahydrofuran is to count the number of each atom present in a single molecule using the chemical formula, COHCH2...
8.1 Molar Mass The molar mass (molecular weight) of a hydrate can be determined from its crystal structure and the degree of saturation. The molar mass of the hydrate, M, is given by: (8.1)M=NWMW+∑j=1c∑i=1nYijνiMjNW+∑j=1c∑i=1nYijνi where NW is the number of water mole...
The number-average (Mn) and weight-average (Mw) molar masses of Ac-HWKL determined at 785 nm were approximately 6.2 and 6.5 times larger, respectively, than the values estimated using a conventional calibration curve created with authentic polystyrene standards in tetrahydrofuran (THF). Based on ...
LS has something in common with the viscosity detector that is a molar mass-sensitive detector; thus, the LS signal is proportional to the concentration and the molar mass of the polymer chains. The scattered light of a polymer in solution can be measured at several angles. There are LS equ...
The weight average molar mass (M(w)) and root mean square radii of starches from waxy maize (Amioca), waxy rice flour, cassava, Hylon V, Hylon VII, and potato amylose were determined by size-exclusion chromatography (SEC) and multiple-angle laser light scattering (MALLS). Dimethylsulfoxide...
Tetrahydrofuran was used as the mobile phase of GPC, and a mixed gel-type column was applied. Repeatability of the analysis was examined using polyvinyl chloride in which plasticizers of phthalic acid esters were added. The R.S.D. for each peak area of plasticizers were within 0.5–2.0%. ...
The molar-mass distribution of polytetrahydrofuran and copolymers of tetrahydrofuran and alcohol ether is narrowed by mixing the polymers with a mixture consisting of a cycloalkane, methanol and water in the 0-40 DEG C range. Both phases that are formed are separated at 40-80 DEG C, and ...
Results of photon correlation spectroscopy measurements on polystyrene (PS) standards in dilute tetrahydrofuran (THF) solutions are presented. The experiments were performed at 45掳C on eight different samples covering the molar mass range between 5路105 and 1,6路107 g/mol. The first cumulant of ...
The molar-mass distribution of polytetrahydrofuran and copolymers of tetrahydrofuran and alcohol ether is narrowed by mixing the polymers with a mixture consisting of a cycloalkane, methanol and water in the 0-40 °C range. Both phases that are formed are separated at 40-80 °C, and polymers...