Question

Imi puteti rezolva tot testul va rog?

Answer 1

1.omogene, chimice, dizolvare, fizic, dizolvat, dizolvant. Diluata, nesaturata
2. a.dizolvatul- NaCl (sare), dizolvant- apa, stare lichida
    b.dizolvatul-acid acetic, dizolvant-apa, stare lichida
    c. dizolvatul -azot, dizolvantul- azot, stare gazoasa
   d. dizolvatul -plumb, dizolvantul-fier, st. solida
3.lac de unghii--acetona
ulei---sulfura de carbon
iod---alcool
sare--apa
4.c=md*100/ms=10*100/100=10%
5.c=md*100/ms, c=5%, ms=120g, md=c*ms/100=5*120/100=6g
6. c1=20%, ms1=500g, md1=c1*ms1/100=20*500/100=100g
c2=50%, ms2=300g, md2=c2*ms2/100=50*300/100=150g
mdf=md1+md2=100+150=250g,   msf=ms1+ms2+mapa=500+300+200=1000g
cf=mdf*100/msf=250*100/1000=25%