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Molecular Mass

How do you find the mass in grams of atoms in an element?


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Answered 2018-04-01 20:18:49

A mole of any element has 6,022 140 857.e23 atoms.

Mass of one atom is atomic weight/6,022 140 857.e23.

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Yes. To find out the mass of a mole of atoms of any given element, see the atomic mass given on the periodic table. A mole of carbon atoms has a mass of 12.011 grams. A mole of sulfur atoms has a mass of 32.06 grams.


To convert mass to atoms:Find the atomic mass of the element in the substance. You can find atomic masses on the periodic table. Ex. Lithium's atomic mass is 6.9 grams (round if you need to)Then find the mass of the substance in grams. Ex. you have 18.2 grams of a sample of Lithium.The mass of the sample is multiplied by 6.02 * 1023 and divided by the atomic mass.Ex.mass of sample in grams * (6.02 * 1023 atoms) / (atomic mass) = # atoms in grams18.2 grams * (6.02 * 1023 atoms) / (6.9 grams) = 1.59* 1024 atomsThe number 6.02 * 1023 is Avogadro's Constant which is the amount of atoms (or molecules) in one mole.


# atoms x (atomic mass of element in grams) / (6.02 x 1023) = # grams


Divide the number of grams by the atomic mass of the element and multiply by Avogadro's number.


Because the gram atomic mass of an element is the mass in grams of Avogadro's Number of atoms. To find the actual mass of a single atom, the gram atomic mass must therefore be divided by 6.022 X 1023.


(grams) x (6.02 x 1023) ÷ (mass number of specified element in grams) Find the mass of the specified element by using the atomic mass on the periodic table. If it is a compound, add up the atomic masses of each atom in the compound.


Simple: the atomic weight expressed in grams. Example for dysprosium - 162,500 grams.


Use a periodic table to find the molar mass of the element (the atomic mass=the molar mass). The molar mass = the number of grams of an element that contains 6.022•1022 atoms of the element. The reciprocal of the molar mass times 6.022•1022 equals the number of atoms in the sample.


The molar mass of any element is its atomic weight (amu) in grams, and 1 mol of any element is 6.022 x 1023 atoms. Therefore, the mass in grams of 6.022 x 1023 atoms of N = 14.01g N.


The atomic mass, in grams, is the mass of one mole of atoms.


1 atomgram of a chemical element has 6,02214129(27)×1023 atoms. 1 atomgram=atomic weight of a chemical element exprimed in grams.


Molar mass of an element is the atomic weight on the periodic table in grams. 1 mole of atoms of an element is 6.022 x 1023 atoms. To find the mass of one atom of an element, divide the element's molar mass by 6.022 x 1023 atoms.Example:Sodium, Na, has a molar mass of 22.989770g/mol (atomic weight in grams)1 mole Na atoms = 6.022 x 1023 atomsSolution:22.989770g/mol x 1mol/6.022 x 1023 atoms = 3.818 x 10-23g/atom


# atoms (mass number of specific element) / (6.02 x 1023)




6.02 x 1023 atoms of an element is one mole of that element. The mole, based on Avagadro's number, is defined as the number of Carbon atoms that would have a mass of 12 grams. This is a scaling factor related to atomic mass. Krypton has an atomic mass of 83.8, so if a mole of an unknown element is 83.8 grams, then that element is Krypton.


MOLES TO GRAMSMultiply the number of moles by the molar mass of the substance.CONVERSION FACTORNumber of moles x Molar mass////////////////////////// 1 molGRAMS TO MOLESDivide grams by the molar mass of the substance.CONVERSION FACTORMass (g) x 1 mol/////////// molar massFinding Molar MassNumber of Atoms Element A x Atomic Mass Element A (periodic table) = mass (g)Number of Atoms Element B x Atomic Mass Element B (periodic table) = mass (g).. etc.Add the mass values found above and you have molar mass.Ex. Ba3N2 (Barium Nitride)3 Atoms Ba x 137.33 = 411.999g2 Atoms N x 14.0067 = 28.0134gMolar Mass = 439.9944 (411.999 + 28.0134)


The gram atomic weight or gram atomic mass of a chemical element is the mass in grams of Avogadro's number of atoms of the element with the isotopic proportions found in nature.


159.8 grams The masses (atomic mass) on the periodic table are the mass of 1 mole of the element. So all you have to do is find the atomic mass of bromine (79.9 grams) and multiply it by two since there are two atoms in the molecule.


(grams) x (6.02 x 10^23) / (mass number of specific element in grams)


The molar mass is the sum of the atomic weights of atoms contained in the molecule.


A gram atom of an element is the mass in grams of Avogadro's Number, about 6.022 X 1023, of atoms of the element.


Multiply number of moles by the molecular mass of the element or compound


Each element has a unique molar mass which is given in grams per mole. So if the amount of the substance in moles is known, then the mass in grams can be found by multiplying them together.


Molar mass is a term applied for molecules, not for atoms.



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