Search results
Results from the WOW.Com Content Network
The Canadian federal government's Innovation, Science and Economic Development Canada allots the individual call signs to the radio amateurs it licenses. There are 24 possible 2-letter prefixes and 240 2-letter/1-number prefixes available to Canadian operators based on the ITU blocks (CF–CK, CY–CZ, VA–VG, VO, VX–VY and XJ–XO).
In its pure form, VX is an oily, relatively non-volatile liquid that is amber-like in colour. [4] Because of its low volatility, VX persists in environments where it is dispersed. [5] [6] VX, short for "venomous agent X", [7] is one of the best known of the V nerve agents and originated from pesticide development work at Imperial Chemical ...
However, mobility is much more commonly expressed in cm 2 /(V⋅s) = 10 −4 m 2 /(V⋅s). Mobility is usually a strong function of material impurities and temperature, and is determined empirically. Mobility values are typically presented in table or chart form. Mobility is also different for electrons and holes in a given material.
Where HV is the hydroxyl value; V B is the amount (ml) potassium hydroxide solution required for the titration of the blank; V acet is the amount (ml) of potassium hydroxide solution required for the titration of the acetylated sample; W acet is the weight of the sample (in grams) used for acetylation; N is the normality of the titrant; 56.1 is ...
The bond valence method or mean method (or bond valence sum) (not to be mistaken for the valence bond theory in quantum chemistry) is a popular method in coordination chemistry to estimate the oxidation states of atoms. It is derived from the bond valence model, which is a simple yet robust model for validating chemical structures with ...
VR (Russian VX, VXr, Soviet V-gas, GOSNIIOKhT substance No. 33, Agent "November") is a "V-series" unitary nerve agent closely related (it is an isomer) to the better-known VX nerve agent. [1] It became a prototype for the series of Novichok agents .
Entity refers to the type of particle/s in question, such as atoms, molecules, complexes, radicals, ions, electrons etc. [1] Conventionally for concentrations and activities, square brackets [ ] are used around the chemical molecular formula. For an arbitrary atom, generic letters in upright non-bold typeface such as A, B, R, X or Y etc. are ...
Butane (C 4 H 10) has two different structural isomers: n-butane, with a linear structure of four carbon atoms, and isobutane, with a branched structure.The chemical graph for n-butane is a four-vertex path graph, and the chemical graph for isobutane is a tree with one central vertex connected to three leaves.