353 B
353 B
"calculation of relative quantities of reactants and products in chemical reactions"
avogardos numbers = 6.02*10^{23}
n=mole=conversion factor=6.02*10^{23} things (atoms/ions/molecules/formulaunits/etc)
1 pair = 2 things
1 dozen = 12 things
one atomic unit ~= 1 gram / avogardos number avogardos number x atomic unit ~= 1 gram