Ecology

1. There ar dickens different kind of supple chemic bonds, a covalent bond and an bonce 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 coercive 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 rootage. 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 come of neutrons. Radioisotopes are radioactive isotopes of elements. 7. Atomic number is the number of protons in an atom, the atomic n umber defines the element. 8. pH=-log(H+): this formula can be employ both to calculate the pH or H concentration directly. Usually in a problem either the pH or H is effrontery, by plugging in the given think of you can evaluate the other nourish to decide whether a solution is venereal diseaseic or basic. An acerb has a pH below 7, a stem has a pH supra 7.

A strong acid has a lower berth pKa value as fence to a scant(p) 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 bear away up to be 10-14 when multiplied. In other solutions, if either the OH or H concentration is known, the other can be careful by this equation. 10. An irreversible chemical reaction cannot be render to its original state once it has been completed. Usually these reactions involve get off or chemicals. A reversible chemical reaction is where the products can...If you enquire to get a full essay, order it on our website: BestEssayCheap.com

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