is there a difference between formula weight and molecular wieght?

Answer 1

short answer: nope. I hope you mean in that a chemical like ethanol (C2O1H6) has an advertised molecular wieght and you can also add up all the wiegts of the atoms and get the molecualr weight that way? then they are the same... There is a little mass loss by the energy consumed during bond formation, but it is not very much

Answer 2

pick up a 5 or 10 pound weight at the gym and visualize that weight coming off holding the weight in your hands helps bring home just how heavy even 5 pounds of extra fat can be

Answer 3

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Answer 4

molecular weight is a formula weight

we say 'the molecular weight of water is....'
we can also say 'the formula weight of water is...'

but we can't say 'the molecular weight of NaCl is...' coz NaCl is not a molecule, it is an ionic compound
so we say, 'The formula weight of NaCl is...'

so
(applicable)
Molecular weight: for molecules or covalent/molecular compound
Formula weight: for both molecular and ionic compound

Answer 5

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Answer 6

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Answer 7

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Answer 8

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Answer 9

people who eat breakfast have a better shot at losing and maintaining weight loss

Answer 10

Lancenigo di Villorba (TV), Italy

I need two examples, e.g. sodium chloride and methyl chloride.

METHYL CHLORIDE
This compound belongs to "halo-methanes" or some types of industrial solvents. By means of "fraction procedures" you obtain them as pure stuffs in liquid state. In effects, this liquid show the following properties :
-) it is soluble in apolar solvents;
-) a low boiling point's temperature.
Since "atomism theory" you can individuate the smaller amount able to maintain the physico-chemical properties overwritten : this "foundamental unit" is called as "molecule".
You refer to "formula bruta" which is defined by molecules : "formula bruta" is related to "molecular weight".

SODIUM CHLORIDE
This compound is the most constituent common kitchen's salt.
As you know, it belongs to "ionic compounds". In effects, this salt show the following properties :
-) a great solubility in water;
-) a great melting point's temperature;
-) it appears in crystal-form.
In infinitesimal scale, you would see alternative placements for positive sodium ions and negative chlorine ones. In effects, the "Coulomb's laws" stated that any positive sodium ion is completely attourned by six negative chlorine ones and viceversa.
This condition permits NOT you a clear individuation of one lonely small portion maintaining physico-chemical properties of salt.
You must introduce the conventional formula, so you refer to "formula minima" instead "formula bruta, since the latter is defined by molecules which you have not it in salt's cases.
"Formula minima" is related to "formula weight" instead "molecular weight".

I hope this helps you.