structure (organic substances)hydrocarbons (acyclic compounds)computers in chemistry, computer programsConformers have been generated exhaustively or nearly so for n-heptane, n-octane, n-nonane and n-decane using a new conformational space search program in combination with MM2 as the minimizer. When...
How many isomeric alkenes are possible, including stereoisomers, in the following reaction? How many different structural isomers are there for a hydrocarbon with the formula C_5H_{12}? How many different structural isomers are there for a hydrocarbon with the formula C_5H_{12}...
A) How many amino acids are there? B) Is there more than one codon for each amino acid? Amino Acids: Amino acids refer to the organic compounds having two functional groups: carboxylate and amino group. The naming of amino acids is done by IUPAC nomenclature. T...
Many industries have started cutting down on the VOC-emitting chemicals in their products. Look for “low-VOC” or “zero-VOC” labels on products. You should know, however, that there are no standard low-VOC certifications or labeling requirements. For instance,the EPA sayssome labels indica...
Plants often make the same organ in different development contexts. Roots are a quintessential example, with embryonic, primary, lateral, adventitious, and regenerative roots common to many plants. The cellular origins and early morphologies of different roots can vary greatly, but the adult structures...
Chen, K. Xu, How many uracil tautomers there are? density functional studies of stability ordering of tautomers, Chem. Phys. 242 (2) (1999) 217-225.Tian S X;Zhang C F;Zhang Z J;.How many uracil tautomers there are? Density functional studies of stability ordering of tautomers....
There is also evidence to suggest that grazers (animals that feed on plants or stationary animals), particularly selective grazers, can influence the phytoplankton species composition.Many copepods (small, herbivorous crustaceans) and invertebrate larvae pick out selected phytoplankton species from mixed gr...
However, there are many more organic substances and substance classes that pose special challenges, which have not yet been addressed satisfactorily by exposure modelling. To name a few, per- and polyfluoroalkyl substances (PFASs), polar/ionising substances and substances of unknown composition (unkn...
How many asymmetric centers are present in a molecule of 2,4,6-trimethyloctane? (a) 0 (b) 1 (c) 2 (d) 3 (e) 4.How many different types of carbon atoms are present in the following molecule?How many pairs of shared electrons are there in a stable molecule of carbon ...
How many atoms are required to form a molecule? What is a chiral molecule? How many volatile organic compounds are there? How many covalent bonds does carbon form in alkanes? The following cation has a total of how many resonance structures? a) 2 b) 3 c) 4 d) 5 Is the given m...