Question

Alcatuiti si rezolvati probleme folosind tabelul de mai jos.
URGENT!!!

Answer 1

1. ms=md+mapa => mapa=ms-md=100-20=> mapa=80g

ro-densitatea roH2O=1g/ml sau 1g/cm3

ro=ms/V => V=ms/ro= 100/1=100ml

c=md×100/ms=20×100/100=20%

4. ms=md+mapa= 4+16=20g

V=20/1=20ml

c=4×100/20=20%

7.

c=md×100/ms => md =c×ms/100=10×100/100 =10g

mapa=100-10=90g

V=100ml

10. ms=md×100/c=200×100/20=1000g

mapa=1000-200=800g

V=1000ml

13. c=md×100/ms => c=md×100/md +mapa =>

20(md+100)=100md

20md+2000=100md

2000=100md-20md=> 80md=2000=> md=2000/80

md=25g

ms=md+mapa=25+100=125g