Ecology

1. There ar deuce different kind of mobile chemic bonds, a covalent bond and an garret bond. An ionic bond is an attractive force between a positively superaerated chemical group and a negatively charged chemical group. A covalent bond is a authoritative chemical bond in which two atoms share two or more electrons. 2. Moles are a unit specify as the amount of material containing 6.022E23 particles. 3. Molarity is moles of solute per liter of answer. It expresses the solutions tightfistedness. 4. Molecular weight 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 are one of two or more atoms with the same(p) atomic number but with different numbers pool of neutrons. Radioisotopes are radioactive isotopes of elements. 7. Atomic number is the number of protons in an atom, the a tomic number defines the element. 8. pH=-log(H+): this formula can be employ all to calculate the pH or H concentration directly. Usually in a problem either the pH or H is presumption, by plugging in the given think of you can evaluate the other nourish to charm whether a solution is venereal diseaseic or basic. An dose has a pH below 7, a stem has a pH supra 7. A strong acid has a degrade pKa value as fence to a short acid. A strong base 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 water is 10-14. In a thoroughgoing(a) solution of water, the concentration of OH and H are both 10-7 and supplant up to be 10-14 when multiplied. In other solutions, if either the OH or H concentration is known, the other can be deliberate by this equation. 10. An irreversible chemical reaction cannot be hap to its original state once it has been completed. Usually the se reactions involve lodge or chemicals. A! reversible chemical reaction is where the products can...If you look to get a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay