Mar 20, 2021 · What are the SI symbols for molar mass, molarity, and molality? For molality and molarity, there is a difference, but I’ve found that the symbol is the same for molarity and molar mass, i.e. M (a big m). Also, what are the meaningful differences between molarity and molality?

Oct 22, 2014 · The -1 means "per" unit. So your first example mol/L-1 /s-1 is not correct - it would actually be written as mol L-1 s-1, OR mol/(L s). It is also sometimes written as mol/L/s, but the double division is ambiguous and should be avoided unless parentheses are used. If it were mol L-1 s-2, this would mean moles per litre per second per second.

Dec 19, 2016 · The units are mole per liter. $\mathrm{mol \times L^{-1}}$ is more conveniently written $\mathrm{mol/L}$. This set of units is referred to as molarity, and is a common measure of concentration for a solute dissolved in a solvent. The solute may be a solid (ionic or covalent), a gas or a liquid, but is commonly a solid.

Dec 26, 2019 · 0.2 (2.013) = 0.40 mol benzoic acid 0.05 (2.013) = 0.10 mol phenyl boric acid If the mole percent was based on the moles of the LR, the moles of catalyst would be as follows: 0.10 mol benzoic acid and 0.026 mol of phenyl boric acid

Oct 13, 2020 · The symbol mol is due to Ostwald who was a very influential and respected physical chemist more than a century ago. In German, "mole" is "Mol". It is a shortform of Molekül. I believe the Internet Archive has an English translation of his historically famous book of 19th century. This is where I recall reading this.

May 12, 2019 · Also note that both the term and the symbol are deprecated . The term molarity and the symbol $\mathrm{\small M}$ should no longer be used because they, too, are obsolete. One should use instead amount-of-substance concentration of $\ce{B}$ and such units as $\rm mol/dm^3$, $\rm kmol/m^3$, or $\rm mol/L$. Related questions

Jan 8, 2018 · They are stoichiometrically equivalent. Albeit, 2 mol is not equal to 1 mol, but 2 mol NaOH is capable of neutralizing 1 mol H2SO4. As a result, they are said to be equivalent (not equal), hence they have this obscure notation to differentiate these two ideas. $\endgroup$ –

Aug 20, 2021 · Thus, $$\Delta{}H_\mathrm{r} = \pu{2 mol} \times \Delta{}H_\mathrm{f} = \pu{2 mol} \times(\pu{-296 kJ/mol}) = \pu{-592 kJ}.$$ One may argue the publisher was sloppy when writing 2 instead of 2 mol in this line. You may retain that $\Delta{}H_\mathrm{r}$ as a special case (mathematically speaking, a subset) of the more general $\Delta{}H_\mathrm ...

Jun 11, 2019 · $\begingroup$ at% = mol% in case matter is atomised. $\endgroup$ – Poutnik. Commented Jun 11, 2019 at 4:42.

Feb 9, 2023 · The confusion around "molar density units," specifically why kg⋅mol/m³ is used instead of mol/m³, stems from a common oversight. Molar density ρM=n/V indeed tells us the moles per volume unit, typically in mol/m³ or mol/cm³.