how many atoms are present in a sample of pure iron?
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The atomic mass of oxygen is 16.00 amu. The atomic mass of iron (Fe) is 55.85 amu. The atomic mass of radium (Ra) is 226 amu. One mole of atoms of any element contains 6.022 X 1023 atoms, regardless of the type of element.
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2fe is two atoms of Ferrous bt fe2 is a molecule of ferrous.. 2Fe means 2 atoms of Fe while Fe2 means a molecule of Fe containing 2 atoms.
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So then we will have 63.52g of iron and 36.48g of sulphur. So the empirical formula of the compound is FeS.
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There are 5 unpaired electrons in the Fe3+ ion. The reason for this is that Iron has the electron configuration Ar3d5. The 5 d electrons are all...
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According to the US Department of Energy's Jefferson Lab, the answer is: 133,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000. That answer comes from an estimation of the number of atoms in each of Earth's elements, like Iron, Oxygen, Silicon, Magnesium, Sulfur … etc.
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In one mole of hydrogen atoms, there exists approximately 6.02⋅1023 hydrogen atoms.
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There are four unpaired electrons in the iron atom.
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A sample of aluminum oxide, Al2O3(s) A l 2 O 3 ( s ) , contains 8.29×1025 8.29 × 10 25 total atoms.
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The fundamental characteristic that all atoms of the same element share is the number of protons. All atoms of hydrogen have one and only one proton in the nucleus; all atoms of iron have 26 protons in the nucleus.
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Answer and Explanation: Iron has eight valence electrons. The quantity of valence electrons an element has can be determined by counting the number of electrons outside of...
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All copper atoms have atomic number 29: all their nuclei contain 29 protons. But they also contain uncharged particles called neutrons. In natural copper, the atoms are of two kinds. One has 29 protons and 34 neutrons in the nucleus; the other has 29 protons and 36 neutrons (Figure 4).
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To calculate the number of atoms in a sample, you need to find how many moles of the element the sample contains. A mole is a unit chemists use. It's equal to Avogadro's number (6.02 X 1023) of atoms. By definition, the weight of one mole of an element (its molar mass) is equal to its atomic weight in grams.
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Explanation: For iron, Z=26 by definition; that is there are 26 protons, massive, positively charged particles, in the iron nucleus.
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Fe has configuration of 4s2 ,3d6 after losing of 2 electrons it become Fe2+ and have only 3d6 configuration having 4 unpaired electrons and one paired electron .
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Step 3: The highest principal energy level is 4 so the valence electrons in it should be 2 but it is a transition metal. So, it also includes all the electrons outside the noble gas configuration as the valence electrons and therefore there are 8 valence electrons in iron.
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The atomic mass of iron (Fe) is 55.85 amu. The atomic mass of radium (Ra) is 226 amu. One mole of atoms of any element contains 6.022 X 1023 atoms, regardless of the type of element. The mass of one mole of an element depends on what that element is, and is equal to the atom mass of that element in grams.
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Each nitrate ion contains one nitrogen atom and three oxygen atoms. Therefore, one mole of iron(III) nitrate contains one mole of iron, three moles of nitrogen and nine moles of oxygen.