According to Wikipedia, its (quoting)
the number of discrete atomic-scale particles in it divided by the Avogadro constant
So a molecule of hydrogen would have an amount of substance of 2/NA and would have a mass of 2/(6*10^23) daltons?
My Textbook says this is the formula to find energy values for electron shells:
$$E_{mol of electrons} = \frac{-1312kJ}{n^2}$$
where $n$ is in electron shell number
But when we divide by 1 mol to get the energy value for each electron we get
$$E_{electron} = \frac{-2.178 \cdot 10^{-18}}{n^2}...
I haven't had a chemistry class in many years. Recently I saw an interesting article that used a solution of resveratrol (228.25 grams per mole) in dimethylsulfoxide (78.13 grams per mole). The concentration was listed as 5 uMol.
If I had 10 grams of DMSO how much resveratrol would I add to...
In our laboratory class we were required to calculate the stock (mM) and final (µM) concentrations for Glycerol. The tutor said my final calculations were incorrect and that I had made an error. He didn't have enough time show me where I went wrong. I have compared my results with another...
Background: Amount of substance is a fundamental physical quantity which has mole (mol) as it's SI unit. Therefore all expressions for amount of substance should have the unit mole on simplification.
Therefore, if A = Amount of substance (normally in moles), m = Mass of the substance in a...
Homework Statement :[/B]
The density of a 2.05 molar solution of acetic acid is 1.02g/ml. The Molality of the solution is:
(a) 1.14 mole/kg
(b) 3.28 mole/kg
(c) 2.28 mole/g
(d) 0.44 mole/kg
Homework Equations :[/B]
The Attempt at a Solution :[/B]
I tried it out very simply using unitary...
Homework Statement
The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The metal oxides and nitrogen are the only products. Which volume of nitrogen, measured under room conditions, is produced when 0.783 g of anhydrous barium nitrate...