Question

rezolvati ex8 numa va rog

Answer 1

c%=md/ms * 100 => md = 8 * 6/100 = 0,48 kg sare
md = ct si m apa creste => c% scade 
c%=md/ms2 * 100 => ms2 = 0,48 * 100/5 = 9,6 kg solutie
ms2 = ms1 + md + m apa_ => m apa = 9,6 - 8 - 0,48 = 1,12 kg apa
ro = m/V=> V apa = 1,12 m cubi (densitatea apei este 1 g/cm cub)

Answer 2

ms=8kg;c=6% md=ms.c/100=0,48kg
ms1=md100/c1=0,48.100/5=9,6kg
mapă=ms1-ms=9,6kg-8kg=1,6kg=1600g
Vapă=m/dApă=1600g/1g/cm3=1600cm3=1,6L