" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
70% z x= 140
7/10x= 140 / *10
7x= 1400 /:7
x= 200
30%z 200= 3/10 * 200= 60 g
mr=140g
c%=30%
ms=c%*mr/100%=30%*140g/100%=42g
42g-98g h2o
xg-140g h2o
x=42*140/98=60g
nalezy dodac 60g soli do 140g wody aby uzyskac roztwór 30%