w = mdx100/ms
ms = 80 g , w = 6,3%
=> md = msxw/100 = 80x6,3/100 = 5,04 g
ms = md + m.apa => m.apa = ms-md = 80-5,04 = 74,96 g
V.apa = 74,96 ml (ro p=1 g/ml)
p = ms/Vs => Vs = ms/p = 80/1,1 = 72,72 ml
