Răspuns:
A
md=10g
mapa=190g
ms=md+apa=10+190=200g
C=md×100/ms=10×100/190=5,26%
B
ms=150g
C=20%
md=?
mapa=?
md=C×ms/100= 20×150/100=30g
mapa=150-30=120g
C
md=30g
ms=500g
C=?
mapa=?
C=md×100/ms=30×100/500=30%
mapa=500-30=470g
D
ms=200g
mapa=150g
md=?
C=?
ms=md+apa
md=200-150=50g
C=md×100/ms=50×100/200=25%
Explicație:
