Question

Am nevoie de ajutor la chimie. Va rog!! Urgent​

Answer 1

Răspuns:

pentru apa+sare

m solvent= ms-md=400-20=380 g

c= md*100/ms=20*100/400=5%

pentru apa+soda de sulf

20=md*100/500 se simplifica prin 100

md=5*20=100g

m solvent=500-100=400g

pentru alcool+iod

ms=240+60=300 g

c=60*100/300=20%

pt apa+acid sulfuric

40=80*100/ms

ms=80*100/40=200g

m solvent= 200-80=120 g

pt apa + alcool

ms=md+m solvent

md=ms-m solvent

md= 800-600=200 g

c=200*100/800=25%

pt apa+zahar

ms=m solvent+ md

ms=160+40=200 g

c=40*100/200=20%

Sper ca te am ajutat!