Adjectivemolecular (comparative more molecular, superlative most molecular) Positive molecular Comparative more molecular Superlative most molecular
Derived terms
From Wiktionary under the GNU Free Documentation License. A molecule is defined as an electrically neutral group of at least two atoms in a definite arrangement held together by very strong (covalent) chemical bonds. Molecules are distinguished from polyatomic ions in this strict sense. In organic chemistry and biochemistry, the term molecule is used less strictly and also is applied to charged organic molecules and biomolecules. In the kinetic theory of gases, the term molecule is often used for any gaseous particle regardless of its composition. According to this definition noble gas atoms are considered molecules despite the fact that they are composed of a single non-bonded atom. A molecule may consist of atoms of a single chemical element, as with oxygen (O2), or of different elements, as with water (H2O). Atoms and complexes connected by non-covalent bonds such as hydrogen bonds or ionic bonds are generally not considered single molecules. No typical molecule can be defined for ionic crystals (salts) and covalent crystals (network solids), although these are often composed of repeating unit cells that extend either in a plane (such as in graphene) or three-dimensionally (such as in diamond or sodium chloride). The theme of repeated unit-cellular-structure also holds for most condensed phases with metallic bonding. In glasses (solids that exist in a vitreous disordered state), atoms may also be held together by chemical bonds without any definable molecule, but also without any of the regularity of repeating units that characterises crystals. From Wikipedia under the
GNU Free Documentation License What is the molecular formula of the compound? Q. Analysis of a newly discovered gaseous silicon-fluorine compound shows that it contains 33.01 mass % silicon. At 27 C, 2.60 g of the compound exerts a pressure of 1.50 atm in a 0.250 L vessel. What is the molecular formula of the compound? Can someone help with the steps, thanks! Asked by shaneruzin - Mon Oct 6 10:14:30 2008 - - 3 Answers - 0 Comments A. use PV = nRT first P = 1.5 atm V = 0.25 L T = 27 C = 300 K R = 0.08206 atm.L/K.mol n = 0.01523 mol of the compound find the molecular mass of the compound n = mass/molecular weight 0.01523 mol = 2.6 g/MW MW = 170.6848 g/mol now the tricky part the compound consists of 33.01% mass of Si means the balance of 66.99% mass is F the MW = 170.6848 g/mol then the amount of Si = 170.6848 g/mol x 0.3301 g/ (g/mol) Si = 56.343 g the amount of F = 170.6838 g/mol x 0.6699 g/ (g/mol) F = 114.342 g find the moles of each element n Si 2 n F 6 then the formula = Si2F6 Answered by pOjiE - Mon Oct 6 10:52:39 2008 What happens to things on a molecular and atomic level when they burn? Q. What actually happens to things on a molecular and atomic level when they burn? Do the atoms themselves burn? Or are they changed into something different? Thanks. Asked by Tim G - Fri Apr 4 00:24:19 2008 - - 1 Answers - 0 Comments A. Normal combustion (Burning) is a complex sequence of chemical reactions, not a nuclear, so nothing changes on the atomic or quantum level. What happens on a molecular level is very complex, it is basically a sequence of exothermic (gives off heat) chemical reactions (oxidation) between fuel and an oxidant. Answered by Nukemann - Fri Apr 4 00:38:41 2008 Which one of the following statements is NOT applicable to molecular solids?
Q. Which one of the following statements is NOT applicable to molecular solids? 1. Molecular solids have relatively low melt- ing points. 2. The units that occupy the lattice sites are molecules. 3.Molecular solids are usually excellent con- ductors of electric current. 4. The binding forces in molecular solids are dispersion forces, dipole-dipole interactions, or hydrogen bonds. 5. Molecular solids are soft compared to covalent solids 5 is not the right answer. Asked by Ayazz - Wed Apr 9 17:45:07 2008 - - 2 Answers - 0 Comments A. I would say 3, since molecular solids have no conduction bands, as would covalent solids, i.e. silicon or diamond. Answered by Glen Lewis - Wed Apr 9 18:24:09 2008 From Yahoo Answer Search: "molecular"  news.google.com Scientific American A new study shows that galaxies present just a few billion years after the big bang had much more star-forming material, in the form of molecular gas, ... Astrophysics: Less greedy galaxies gulp gas Nature.com (subscription) Stellar Baby Boom of Early Universe Explained Space.com Why Today's Galaxies Don't Make As Many Stars As They Once Did UA News (press release) Astronomy Magazine all 11 news articles » news.google.com Science Magazine (subscription) Success depends on the acceptance and use of contemporary molecular techniques, as well as the increasing development of farming systems that use saline ... and more » news.google.com Trading Markets (press release) "If we are successful in finding the molecular signature in blood as we were in tissue, HDC will have both a tissue-based colon cancer test to be used on ... and more » From Google News Search: "molecular"  allwallpaper.org 480px x 640px | 53.20kB [source page] Mobius jpg date 08 21 2007 Molecular Tentacles jpg Date 08 21 2007 From Yahoo Image Search: "molecular"  bmedreport.com Chris Fisher hu, 04 Mar 2010 12:05:54 GM MIT neuroscientists have designed a new MRI sensor that responds to the neurotransmitter dopamine, an achievement that may significantly improve the specificity.  pharmainfo.net unknown Wed, 03 Mar 2010 17:36:27 GM Abbott to Collaborate with GSK on . Molecular. Diagnostic Test to Select Candidate Patients for Future Skin Cancer Immunotherapy. Abbott News · Pharma Industry News. Abbott to Collaborate with GSK on . Molecular. Diagnostic Test to Select ...  virologyj.com Jean-Michel Lett ue, 23 Feb 2010 00:00:00 GM Molecular. diversity of Cotton leaf curl Gezira virus isolates and their satellite DNAs associated with okra leaf curl disease in Burkina Faso. Fidele Tiendrebeogo email , Pierre Lefeuvre email , Murielle Hoareau email ... From Google Blog Search: "molecular" |
