Gram-molecular weight

It is a ratio. The molecular weight is equal to the sum of the atomic weights of the constituent nuclei. The molecular weight expressed in grams is known as the gram molecular weight. 

It may be pointed out that for uni-univalent electrolytes the values of a and am are identical since the gram equivalent weight and the gram molecular weight are the same. In the case of uni-bivalent and bi-univalent electrolytes the a value is half the am value since the equivalent weight of such compounds is half the molecular weight. 

Calcium-sodium-chloride-type brines (which typically occur in deep-well-injection zones) require sophisticated electrolyte models to calculate their thermodynamic properties. Many parameters for characterizing the partial molal properties of the dissolved constituents in such brines have not been determined. (Molality is a measure of the relative number of solute and solvent particles in a solution and is expressed as the number of gram-molecular weights of solute in 1000 g of solvent.) Precise modeling is limited to relatively low salinities (where many parameters are unnecessary) or to chemically simple systems operating near 25°C. 

From (2), the solution contains 0.2mol dnC3 NaCl, or 11.7g dm-3. If the density is 1.006, then 1dm3 has a mass of 1006 g. 1dm3, therefore, contains 1006 — 11.7 g of water, or 994.3 g. Since the gram molecular weight of water is 18 g, this indicates that there are ... 

For gases and vapors, exposure concentrations are traditionally expressed in parts per million (ppm). The calculation for the ppm of a gas or vapor in an air sample is based on Avogadro s Law, which states that Equal volumes contain equal numbers of molecules under the same temperature and pressure. In other words, under standard temperature and pressure (STP), one gram-molecular weight (mole) of any gas under a pressure of one atmosphere (equivalent to the height of 760 mm mercury) and a temperature of 273 K has the same number of molecules and occupies the same volume of 22.4 liters. However, under ambient conditions, the volume of 22.4 liters has to be corrected to a larger volume based on Charles Law, which states that at constant pressure the volume of gas varies directly with the absolute temperature. Thus, at a room temperature of 25° C, one mole of a gas occupies a volume of 24.5 liters. 

It may be calculated by dividing the gram-molecular weight by the number of electrons lost by each molecule, for instance ... 

The number of atoms, symbolized by either L or Na, in 0.012 kg of pure carbon-12, equivalent to 6.0221367 X 10 per mole. 2. The number of molecules in one gram-molecular weight (1 mole) of any compound. 

Calculate the mass per particle and the gram molecular weight of the two micelle fractions, assuming p = 1.43 g cm-3 for the dispersed phase. 

The formation of tellurium dioxide from tellurium and oxygen is attended, according to Mixter, by the evolution of 87,100 calories per gram-molecular weight.4 Schuhmann 5 gives the heat of formation at 25° C. as 77,700 calories and the free energy of formation as —64,320 calories. 

Tellurium trioxide is an orange-yellow solid, of density 5T0 at the ordinary temperature.7 Its heat of formation per gram-molecular weight is 83-6 Calorics,8 and according to Mixter the decomposition of the trioxide into the dioxide is an exothermic reaction (cf. p. 380). As might therefore be expected, this decomposition occurs readily and at such a temperature that the resulting dioxide is unfused. 

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