Element Oxygen Essay

This is true because 1 mole of substance contains N, we can make the following statements: 1 molecule of glucose contains 6 atoms of C, 12 atoms of H, and 6 atoms of O; 1 mole of glucose contains 6 moles of C atoms, 12 moles of H atoms, and 6 moles of O atoms; 10 molecule of glucose contains 60 atoms of C, 120 atoms of H, and 60 atoms of O; 10 moles of glucose contains 60 moles of C, 120 moles of H, and 60 moles of O atoms; Any amount of glucose contains equal numbers of C and O atoms, and twice this number of H atoms; Any amount of glucose contains equal numbers of moles of C and O atoms, and twice this number of moles of H atoms. moles Fe = 10.0 g Fe x 1 mole/55.85 g = 0.1791 moles moles S = moles Fe = 0.1791 g S = 0.1791 moles S x 32.06 g S/mole = 5.71 g S : Hemoglobin is the oxygen-carrying protein of most mammals.Each molecule of hemoglobin contains 4 atoms of iron.The mole enables us to count atoms in the laboratory.

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The dual definitions of the mole can be used to find the mass of 1 amu expressed in g. Avogadro's number is an experimentally measured quantity.The atomic weight scale defines the masses of atoms relative to the mass of an atom of C, which is assigned a mass of exactly 12.000 atomic mass units (amu).The number 12 is chosen so that the least massive atom, hydrogen, has a mass of about 1 (actually 1.008) on the scale.Second, 12 is an important number in the English system of weights and measures, so the definition of a dozen as 12 things makes sense.However, the choice of the unusual number, 6.022 x 10 is used, it is necessary to resurrect an older, in some ways more sensible and useful, definition of the mole, which is grounded in the atomic weight scale addressed above.It is nearly analogous to defining a dozen as the mass of a substance that contains the same number of fundamental units as are contained in 733 g of Grade A large eggs.This definition completely obscures the utility of the dozen: that it is 12 things! The mole is the same kind of unit as the dozen -- a certain number of things. First, the number of things in a mole is so huge that we cannot identify with it in the way that we can identify with 12 things.Further, we will know that there are 2 atoms of C and 8 atoms of H per each 2 atoms of O.Thus the mole allows us to weigh convenient amounts of material containing known numbers of atoms; i.e., it allows us to count atoms.Although we are confident that we know its value quite well, some future experiment may cause us to make a small revision in the number.By necessity, the mass of 1 m in grams will change accordingly.


Comments Element Oxygen Essay

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