va roggg un expert în chimie

a)md=(250x10)/100=25g m/apa=ms-md=250-25=200gH2O
b)md=(800x70)/100=56g m/apa=800-56=744gH2O
c)md=(500x40)/100=200 m/apa=500-200=300gH2O
d)md=(700x25)/100=175 m/apa=700-175=525gH2O
e)md=(300x100)/100=300 m/apa=300-30=270gH2O