Recent content by Moondog

Roger that, a careless mistake. Thanks. I appreciate all of your time and attention. I'm now able to follow the effort to standardize the kilogram in terms of Avogadro's number and Planck's constant.

Dale: I don't see any mass squared in my above. That said, I see my mistake: I needed to have divided 12 not multiplied by 12. (whoops!) Thanks for the help.

P(mass) = 1.67262e-24g x 6 protons = 1.0035738e-23 g N(mass) = 1.67492e-24g x 6 neutrons = 1.0049571e-23g Total C(mass) = 2.00853e-23g 2.00853e-23g x 12g(C) = 2.410236e-22g (Mass of 12 grams of C-12)

Robphy: Thanks so much for providing the link to R.A. Millikan's original work. It will take time to plow through. Avogadro's constant should equal roughly the mass of the number of protons and neutrons in 12 grams of C-12, yet it doesn't add up. Any idea why not? (Note: I assume neutron mass...

I guess I missed it. What is a mol of electrons? If it's 6.022e23 then why is Millikan doing the experiment since he would already know what a mol is?

Ibix: What is a mole of electrons? Quantify it for me if you can.

Robphy: How did Millikan know what a "mol of electrons" was before he had quantified Avogadro's number? It is said he determined Avogadro's number by dividing a mol of electrons by the charge of an electron to get 6.022e23. Please tell me what number is equal to a mol of electrons?

What is the number of particles in a mol of electrons? When Milikan divided the mol of electrons by the electron charge, how did he get 6.022e23?

My question is being misunderstood (my fault). How can Milikan talk about a MOL of electrons before the mol had been quantified at 6.022 e23? Put another way, what was Milikan's understanding of how many electrons were in a mol of electrons?

Frustratingly, everything I read about deriving Avogadro's number uses the word "mole" somewhere in the explanation. Per Scientific American, for example, Robert Millikan divided the charge on a mole of electrons by the charge on a single electron to obtain a value of Avogadro’s number of...

Thanks Tom. Very interesting and a good starting place.

Berkman: I am working to show DoD (and FAA) how dry fogging our patented protocol antibacterial can decontaminate a biologically contaminated aircraft (including sporulating pathogens like anthrax) and return it to clearance standards within 24 yours. We will also expand the use of this...

Berkman: House of hydro (https://thehouseofhydro.com/) See dropdown for "Store" tab. Thanks for any help... The FAQs state "House of Hydro ultrasonic water foggers use high output ceramic discs that vibrate 1.7mhz to silently create microscopic (<5 micron) water droplets."

Thank you for noticing me as a new guy. I look forward to learning many things! My father was also retired Army Lt Colonel.

BS in Physics and MS in Business Management. USAF retired. Currently work for Aqua Resources Corp microbiology lab using nanoplatelet technology to decontaminate aircraft, buildings, etc.