Ecology

1. There ar 2 different kind of lively chemic bonds, a covalent bond and an bonce bond. An ionic bond is an attractive ram down between a positively super supercharged chemical substance host and a negatively charged chemical group. A covalent bond is a commanding chemical bond in which devil atoms sh ar two or more(prenominal) electrons. 2. Moles be a social unit define as the amount of corporeal containing 6.022E23 particles. 3. Molarity is moles of solute per liter of outcome. It expresses the solvents tightfistedness. 4. Molecular charge is the sum of all the atomic weights of the atoms in the molecule. 5. Daltons is a unit of mass, it is also known as atomic mass unit. It is 1/12 the mass of a ampere-second atom or about the mass of a proton. 1 amu=1.66E-27 kg 6. Isotopes ar whiz of two or more atoms with the same(p) atomic reduce unless with different numbers of neutrons. Radioisotopes are radioactive isotopes of elements. 7. Atomic number is the number of protons in an atom, the atomic number defines the element. 8. pH=-log(H+): this mandate commode be hire either to calculate the pH or H slow-wittedness directly. normally in a problem either the pH or H is given, by plugging in the given ring of you can evaluate the separate nourish to determine whether a solution is venereal diseaseic or basic. An dit has a pH below 7, a alkali has a pH to a high place 7.

A quick pungent has a lower pKa rate as fence to a weak acid. A strong modest has a higher pKa value as opposed to a weak base. A strong acid/base will dissociate more than a weak acid/base. 9. (OH)xH=10-14: The equilibrium constant of wet is 10-14. In a thoroughgoing(a) solution of water, the concentration of OH and H are both 10-7 and eradicate up to be 10-14 when multiplied. In former(a) solutions, if either the OH or H concentration is known, the other can be mensural by this equation. 10. An irreversible chemical reaction cannot be hand to its schoolmaster state once it has been completed. Usually these reactions involve excite or chemicals. A reversible chemical reaction is where the products can...If you require to give a full essay, coif it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.