Răspuns:
se aplica relatia
c=mdx100/ms, unde ms= md+m,apa
3.2.
ms= 20+180=>200g
c= 20x100/200= 10%
3.4
md= cxms/100g=10x250/100g=25g
3.7
ro= m/v-> ro,apa= 1g/ml
md= cxms/100=20x200/100g=40g
m,apa= m,s-md= 200-40=> 160g
V= m/ro=160g/1g/ml= 160ml
Explicație:
