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You start with the mass of the compound. This you divide by the total molecular mass of the compound (the Atomic Mass of 1 molecule) and you multiply this by the amount of atoms 1 molecule consists of.

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11y ago
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14y ago

First, go to your Periodic Table of Elements to get the atomic weight of each constituent element, then multiply that by the number of atoms of that element in the compound in question, add up all the resulting weights for all the constituent elements, and presto! You have the weight of the compound, per mole.

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12y ago

Take 1/2 the density and multiply it by 2 times the atomic radius. all info is given on the reference table

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Q: How do you find formula weight of a compound?
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Related questions

What is the molecular formula of a compound if the weight is of a unit of the compound is 120 and the empirical formula is C3H4?

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The formula weight of a compound is determined by adding up the individual weights of every what in that compound?

the formula weight of a compound is determined by adding up the individual weights of every atom in the compound. For example the formula weight of Magnesium Bromide (MgBr2)= 24 + 2(80) = 184


How do you calculate the equivalent weight of compound?

the sum of the atomic weights for all the atoms in the formula


How do you find molarity given the percentage mass and its density?

To find this you also need to know the chemical (or formula) weight of one mole of the compound in grams per mole (so about which compound you're talking about).


What is the importance of percentage composition?

Percent composition can be used to calculate the percentage of an element/compound in a mixture. From the percent composition, you can also find the empirical formula. And from the empirical formula you can find the actual molecular weight.


The formula weight of a compound is determined by adding up the individual weights of every in that compound.?

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How do you find the molecular formula for a compound with mass of 78amu?

You can't without more information. You cannot go from the molecular weight of a compound to its formula without more information about what atoms it contains.See the Related Questions link to the left for a more detailed discussion of this.


How do you find the empirical formula of a compound of uranium and fluorine that is composed of 67.6 percent uranium and 32.4 percent fluorine?

This compound is UF6. Atomic weight of uranium: 238,02891 Atomic weight of fluorine: 18,9984032 Molecular mass of UF6: ca. 352,04121


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What is the formula weight of calcium sulfite?

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Zinc chloride formula weight of 136.28 what is its formula?

Zinc's weight is 65.4, and Chlorine's weight is 35.5. Add the weight of the two chlorine atoms to one zinc atom. The resulting formula is ZnCl2.