Methane does not have an atomic number. This is because methane is not an element; it is a compound molecule. It is made of one carbon atom and four...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your...
(ii) State a use for kerosene and a use for bitumen.(2)kerosene bitumen(b) A molecule of the hydrocarbon eicosane has the formul a C20H42(i) Explain which homologous series eicosane belongs to.2)(ii)Name a catalyst used in the industrial cracking of eicosane.(1)(iii) In a ...
HMCES (redirected fromHydrogen Mitigation Controlled Exhaust System) AcronymDefinition Copyright 1988-2018AcronymFinder.com, All rights reserved. Suggest new definition Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or visitthe webmaster's page for free fun...
bromine.(3)(d) Chlorine occurs naturally as a diatomic molecule.Draw a dot-and-cross diagram to show the bonding in a molecule of chlorine.Show outer shell electrons only.(1)(e) Chlorine is a gas at room temperature an d pressure.Explain why chlorine has a low boiling temperature.(2) ...
Molecule: The smallest particle of an element or compound with an independent existence and can retain all the properties is called a molecule. Types of elements: Depending upon the physical and chemical properties, the elements are further subdivided into three classes; metals, non-metals and meta...
Theophyllinerelaxes smooth muscles of the bronchi — and has been used for this purpose in the treatment of asthma.Theobrominefrom the cocao tree (Theobroma cacao), contains no bromine and is the principal alkaloid in cacao. Theobromine is a diuretic (increases urine production) that can dilate ...
(e) Cyclohexene is another industrially important alkene.(1) Explain how the enthaloy change of hydrogenation of cyclohexene is used to give evidence for the bonding in the benzene molecule.(i)* Cyclohexene and benzene both react with bromine but in different ways.Compare the two reactions and ...
but is a straightforward consequence of the fact that the electron density accumulates in the vicinity of the covalent bond – especially for more polarisable halogens such as bromine and iodine. This redistribution of charge is accompanied by an ‘equatorial’ band of negative charge between these...
What is a polar covalent molecule? What is the classification of iodine? What is the bond order of I2? What is the bond order of Br2? What is the hybridization of the bromine atom in BrF5? How does electronegativity affect metallic bonding?
Nitrogen and bromine-doped carbon dots (N,Br-CDs) were newly prepared, employing 4-bromo-12-phenylenediamine as the precursor. For N, Br-CDs, the optimal emission wavelength is 582 nm (with excitation at 510 nm) at pH 70, and shifts to 648 nm (excitation at 580 nm) at pH 30 50. ...