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2010-11-19 13:59:26
2010-11-19 13:59:26

One: The formula for magnesium fluoride is MgF2. Since each mole of fluorine molecules, which have the formula F2, contains two moles of fluorine atoms, one mole of each is the right ratio.

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The answer is two moles of F atoms or 1 mole of F2 molecules.



A mole always contains Avogadro's number of molecules (6.02 x 10 to the 23). A fluorine travels as F2, there will be twice that in atoms. You want 4 moles, so multiply by 4.


From the formula, you have 2 atoms of Magnesium combine with one oxygen molecule to form 2 molecules of magnesium oxide. So when 4 magnesium atoms combine with two molecules of oxygen you get 4 magnesium oxide molecules. So from 4 moles of magnesium you get 4 moles of Magnesium oxide.


4,515.10e24 atoms of magnesium is equal to 7,5 moles.


The mass of 4 moles of fluorine F atoms is 151,98 g (because fluorine is a diatomic element).


A sample that contains 1.061023 fluorine atoms has 3,347 moles.


The mass of 4 moles of fluorine (F) atoms is 76 g.


1.50 x 10 to the 23 atoms of fluorine is equal to 0,249 moles.


You have to multiply the number of moles by Avogadro's number (6.022x10^23). The product of the two numbers will give you the number of atoms.


5.55 moles Mg ((6.022 × 1023) ÷ 1 mol Mg) = 3.34 × 1024 atoms of Mg


Whatever be the substance the one gram mole of that substance would have 6.023 x 1023 atoms or molecules or ions in it. Hence to get the mole just divide the number given by 6.023 x 1023



3 moles of water molecules.6 moles of hydrogen atoms.3 moles of oxygen atoms.30 moles of electrons.30 moles of protons.etc.


4 moles of oxygen atoms (being present in 4 moles of H2O) and, so: 4 moles of oxygen atoms is 4*6.02*1023 = 24.1*1023 molecules ATOMS of oxygen


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.


1 mole=6.02*1023 molecules or atoms5.23 moles=6.02*1023 * 5.23= {[(3.14846*1024molecules)]}



To convert the number of atoms to moles: You need the number of atoms in a substance which is usually given. Ex. 1.65 × 1024 atoms of Magnesium. Then the formula is as follows: # of atoms ÷ (Avogrado's Constant) = # moles 1.65 × 1024 atoms ÷ (6.02 × 1023) = 2.74 moles of Mg


8 moles of Hydrogen molecules reacts with 4 moles of Oxgen molecules to produce 8 moles of water8 moles of Hydrogen atoms reacts with 4 moles of Oxgen atoms to produce 4 moles of water


If it is 1.54 moles of Br atoms then the answer is 9.274 X 1023 atoms.If it is 1.54 moles of Br2 molecules then the answer is 1.855 X 1024 atoms.


Glucose is C6H12O6 and thus the mole ratio is 6 moles of carbon to 6 moles of Hydrogen Molecules (12 moles of Hydrogen atoms) and 3 moles of oxygen molecules (6 moles of oxygen atoms)


The number of helium atoms (not molecules) is 39,7945.10e23.


There are two moles of hydrogen molecules and 4 moles of hydrogen atoms.


If 4,65.10e24 is the number of molecules (ions, atoms) the answer is 7,72 moles.



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