Both formula mass and molecular mass refer to the mass of a compound relative to 1/12 of the mass of a Carbon-12 atom. However, molecular mass is specific to molecules – that is, only for a minimum of 2 atoms held together by covalent bonds. As an example, you can say that the molecular mass of water is 18. You can also say that the formula mass of water is 18. You can say that the formula mass of common table salt, NaCl, is 58.5, but it would be inaccurate to say that the molecular mass of NaCl is 58.5, since NaCl is not a molecule. The difference is not in numerical value but merely terminology.
It would perhaps be more accurate to use the terms formula mass and molecular mass rather than formula weight and molecular weight. This because in physical terms, weight is a force while mass is a measure of the amount of substance in something. Both formula mass and molecular mass refer to the mass of a compound relative to 1/12 of the mass of a Carbon-12 atom. However, molecular mass is specific to molecules – that is, only for a minimum of 2 atoms held together by covalent bonds. As an example, you can say that the molecular mass of water is 18. You can also say that the formula mass of water is 18. You can say that the formula mass of common table salt, NaCl, is 58.5, but it would be inaccurate to say that the molecular mass of NaCl is 58.5, since NaCl is not a molecule. The difference is not in numerical value but merely terminology.
The difference between formula weight and molecular weight is in terms of type of compounds. Formula weight refers to the total of all atomic weights in the specific formula. Formula weight is used for ions rather than molecules. Molecular weight refers to the total of all atomic weights in the specific molecule.
Equivalent weight is the amount of an element that reacts, or is involved in reaction with, 1 mole of electrons. It is 'defined' by many texts as the weight of the element combining with 1 g hydrogen, 8 g oxygen or 35.5 g chlorine, each of which would either provide or accept one mole of electrons in a reaction.
For example, hydrogen, with atomic weight 1.008 and valence 1, has an equivalent weight of 1.008. Oxygen assumes a valence of 2 and has an atomic weight of 15.9994, so it has an equivalent weight of 7.9997.
What is the molecular weight?
The molecular or molar mass of a substance is the mass of 6.022*10^23 molecules of the substance, in grams. (there is a very complicated difference between molar and molecular mass, but for practical purposes, we can consider these interchangeable)
The distinction between these two values is as follows:
If you prepare a solution of 1 litre containing 1 equivalent mass, the solution is called a Normal solution and is abbreviated, 1.00N. If you prepare a solution containing 1 molar mass of substance dissolved to a volume of 1 litre, then the solution then the solution is called a Molar solution, abbreviated, 1.00M.
When dealing with monoprotic acids, such as HCl or HNO3 the molar mass is the same numerically as the equivalent mass. Therefore a 1N HCl is exactly the same as 1M HCl
When dealing with a diprotric acid, such as H2SO4, where 1 molar mass has two reactable hydrogens, The 1N solution has half the concentartion of the 1M solution
When you deal with a triprotic acid, such as H3PO4. the 1N solution will have 1/3 the concentration of a 1M solution.
The same situation applies to bases: 1M NaOH is exactly the same as 1N NaOH. But 1M Mg(OH)2 is double the concentration of 1N Mg(OH)2.
because the formula mass is the sum of the atomic masses of the atoms in a chemical compound or element while the Atomic Mass is the mass of an element's atoms, listed in the Periodic Table as an average value based on the relative abundance of the elements isotopes.
You haven't specified the molecular weight, or even the compound in question. If you find this out, divide by the molecular weight to get your answer.
Molecular Diffusion Of Light
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Any foreign particle interact with Antibody or T cell is antigen. Interaction is non-covalent and highly specific. Antigen that evoke immune response is called Immunogen. An immunogen usually has a fairly high molecular weight (usually greater than 10,000), thus, a variety of macromolecules such as proteins,lipoproteins, polysaccharides, some nucleic acids, and certain of the teichoic acids, can act as immunogens.
glycine molecular weight high so mobility also high so using in SDS PAGE
Calculate the empirical formula weight. Find the ratio of the molecular weight to the empirical formula weight. (n= molecular weight/ empirical formular weight). Multiply each subscript of the empirical formula by n.
molecular structur C9H8K2O4molecular weight: 258.35
1 mol is equal to 6.02214179(30)×1023 molecules of the substance. The molecular weight is how much grams these molecules (6.02214179(30)×1023) weigh. Meaning g/mol.
Molecular formula: C29H50O2 Molecular weight: 430.71 CAS Number: 2074-53-5
The molecular weight for mineral calcite is 100.09. Calculated from the formula (Mol_Wt_Calc).
molarity x molecular weight x volume=gram molarity= gram/molecular weight x volume abdulrazzaq
Iron(II) sulphate Chemical formula is FeSO4 The molecular weight is 151,908 g (for the anhydrous salt)
C3H5Cl Molecular weight: 76.5257 kg/kmol
The formula for silver nitrate is AgNO3. Its molecular weight is 169.87g/mol.
The molecular weight of MgSO4 is 120.3676 g/mol.
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
Technically... not really. It would perhaps be more accurate to use the terms formula mass and molecular mass rather than formula weight and molecular weight. This because in physical terms, weight is a force while mass is a measure of the amount of substance in something.