Ecology

1. There ar ii different kind of wide awake chemic bonds, a covalent bond and an bonce bond. An ionic bond is an attractive force between a positively super charged chemical group and a negatively charged chemical group. A covalent bond is a inviolable chemical bond in which two atoms share two or more electrons. 2. Moles are a unit be as the amount of material containing 6.022E23 particles. 3. Molarity is moles of solute per liter of dissolving agent. It expresses the solutions tightfistedness. 4. Molecular weight is the sum of all the nuclear 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 metrical composition of neutrons. Radioisotopes are radioactive isotopes of elements. 7. Atomic number is the number of protons in a n atom, the atomic number defines the element. 8. pH=-log(H+): this formula can be employ either to calculate the pH or H concentration directly. Usually in a problem either the pH or H is disposed(p), by plugging in the given think of you can evaluate the other nourish to jog whether a solution is venereal diseaseic or basic. An sulphurous has a pH below 7, a stem has a pH supra 7.

A strong acid has a glare pKa value as fence to a pale 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 con stant of water is 10-14. In a thoroughgoing! (a) solution of water, the concentration of OH and H are both 10-7 and run through up to be 10-14 when multiplied. In other solutions, if either the OH or H concentration is known, the other can be metric by this equation. 10. An irreversible chemical reaction cannot be softwood to its original state once it has been completed. Usually these reactions involve rout out or chemicals. A reversible chemical reaction is where the products can...If you solicit 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