Since there are no subscripts, there is .800 moles of Oxygen atoms and .800 moles of Magnesium because there is .800 moles of the compound.
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Diphosphorus pentoxide has 5 oxygen atoms per molecule according to the given prefix. So, 5 moles of it will be 5 x 5 x (6.022x10^23) = 1.51x10^25 oxygen atoms.
4 moles of oxygen atoms are present in 4 moles of H2O
Ten million atoms / Avagadro's Number, 6.022e23 atoms per mole = 1.66e-17 moles
9 moles (there are four oxygen atoms for every mol of BaSO4, so you multiply 2.25 by 4)
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5,26 moles of oxygen contain 31,676.10e23 atoms.
10 moles of oxygen atoms or 5 moles of oxygen molecules.
There is 25.0 moles Oxygen
Diphosphorus pentoxide has 5 oxygen atoms per molecule according to the given prefix. So, 5 moles of it will be 5 x 5 x (6.022x10^23) = 1.51x10^25 oxygen atoms.
4 moles of oxygen atoms are present in 4 moles of H2O
The answer is 0,0625 mol.
Ten million atoms / Avagadro's Number, 6.022e23 atoms per mole = 1.66e-17 moles
9 moles (there are four oxygen atoms for every mol of BaSO4, so you multiply 2.25 by 4)
3KNO3, so 9 oxygen atoms.
The formula means, among other things, that there are 7 atoms of oxygen in each mole of the compound. Therefore, in 4.00 moles of the compound, there are 28.00 moles of oxygen atoms. Elemental oxygen usually is diatomic, so that there would be the equivalent of 14 moles of diatomic elemental oxygen.
20 x 2 x 6.022x1023 = 2.409x1025 atoms of oxygen
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