<span>Dalton noted that the chromium oxide molecules that he was studying had masses of oxygen that were not the same: he found that there were constant ratios to these mass differences, however, so there had to be some sort of "units" (atoms) making up the ratios of these particles.</span>
The mole is simply an Avogadros number of anything( in this case Br atoms)
The Avogadro number is 6.022 x 10^23.
So no of moles = No of atoms / 6.022 x 10^23 = 2.03 x 10^24 / 6.022 x 10^23 = 3.37 Moles.
What is reflux? isn't it like when u aren't able to digest something?
Mass number is the total number of Protons and Neutrons. Simply subtract 85 from 210. 210-85=125 neutrons
The first person to discover a Periodic Table was Dmitry Mendeleyev, a Russian chemist founded the periodic table in 1869.
Dmitri Mendeleev, considering he created it.
