general chemistry help high school

1) Covalent compounds consist of molecules and not ions. The molecules do not have any electric charge on them. The molecules are held together by weak forces called Van der Waal's forces . 2) Covalent compounds are either gases, volatile liquids or soft solids. As there are weak, Van der Waal's fo..

Shape-selective catalysis are those reactions that depend on the pore structure of the catalyst and the size of the reactant and product molecules. In such reactions, zeolites are used as catalysts. Zeolites are microporous aluminosilicates of the general formula M x / n [(AlO 2 ..

. At high altitudes like Ooty, having lower atmospheric pressure, water boils at a much lower temperature than in the plains like Bangalore where atmospheric pressure is higher. Generally, boiling points for most of the liquids are specified as normal boiling points. The normal ..

. They are also known as inner transition elements. Their general electronic configuration is (n-2) f 1 - 1 4 (n-1)d 0 - 1 ns 2 . Ionization potential (I.P) is the energy required to remove the outermost electron from an isolated gaseous atom of an element. Ionization potential increases ..

The general outer electronic configurations of 's' block elements are ns 1 - 2 as all inner shells are already full. The 's' block elements are either all alkali metals like Li, Na, K, Rb, Cs and Fr, as in group 1 (having ns 1 outer electronic configuration) or alkaline Earth met..

. Inhaled anthracene can cause bronchitis like symptoms. There is limited information on human reproductive implications. Anthracene may cause genetic mutations in cells. Anthracene is not currently considered a toxic substance. Phenanthrene is also a skin and eye irritant, with increasing effects ..

In molecules containing double bond, which has a pi bond, there is no free rotation and such molecules exist in isomeric forms of 'cis' and 'trans'. In the 'cis' form the similar atoms lie on the same side of a plane placed along the internuclear axis while in the 'trans' form the similar atoms l..

Zeolites - Shape-Selective Catalysis by Zeolites - Shape-selective catalysis are those reactions that depend on the pore structure of the catalyst and the size of the reactant and product molecules. In such reactions, zeolites are used as catalysts. Zeolites are microporous aluminosilicates of the ..

Silicones are polymeric compounds containing Si-O-Si linkages. These have the general formula (R 2 SiO) n . These may be linear cyclic or cross-linked. These have very high thermal stability and are called high temperature polymers (R may be alkyl or phenyl group). The..

The general formula of Haloalkane (CnH 2 n + 1 - X) or Haloarene is 'RX' where R - is an alkyl or aryl group and X is a halogen atom (F, Cl, Br or I). The halogen derived hydrocarbons are a highly reactive class of compounds. The reactivity is due to the presence of polar carbon..