Ecology

1. There ar deuce different kind of expeditious chemic bonds, a covalent bond and an bean 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 autocratic chemical bond in which two atoms share two or more electrons. 2. Moles are a unit defined as the amount of material containing 6.022E23 particles. 3. Molarity is moles of solute per liter of resolvent. It expresses the solutions tightfistedness. 4. Molecular weight is the sum of all the thermonuclear 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 rime of neutrons. Radioisotopes are radioactive isotopes of elements. 7. Atomic number is the number of protons in an atom, th e atomic number defines the element. 8. pH=-log(H+): this formula can be employ each to calculate the pH or H concentration directly. Usually in a problem either the pH or H is abandoned, by plugging in the given think of you can evaluate the other nourish to jog whether a solution is venereal diseaseic or basic. An demigod has a pH below 7, a stem has a pH supra 7.

A strong acid has a lower pKa value as fence to a namby-pamby 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 wa ter is 10-14. In a thoroughgoing(a) solutio! n of water, the concentration of OH and H are both 10-7 and reverse up to be 10-14 when multiplied. In other solutions, if either the OH or H concentration is known, the other can be measurable by this equation. 10. An irreversible chemical reaction cannot be give way to its original state once it has been completed. Usually these reactions involve rock or chemicals. A reversible chemical reaction is where the products can...If you strike to get a full essay, order it on our website: BestEssayCheap.com

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