Odpowiedź: 1. 25% 2. 30% 3. 6,25%
1,
ms=35g
mH20=105g
mr=35g +105g=140g
C%=ms/mr8100%
c%=35g/140g*100%
C%= 25%
2
C%=15g
.mr= 200g
ms=x
C%=ms/mr*100%
ms=C%*mr/100%
ms= 15%*200g/100%
ms=30g
3.
mr=80g
ms= 5g
C%= 5g/80g*100%
C%= 6,25%