Răspuns :
md=5g
mapa=45
c=?
ms=?
c=md/md+mapa
c=5/5+45
c=5/50
c=0,1%
ms=md*100/c
ms=5*100/0,1
ms=500/0,1
ms=5000
Nu sunt chiar sigura daca trebuie aflata si masa solutiei,dar poti sa faci si sa-i arati profesorului.
mapa=45
c=?
ms=?
c=md/md+mapa
c=5/5+45
c=5/50
c=0,1%
ms=md*100/c
ms=5*100/0,1
ms=500/0,1
ms=5000
Nu sunt chiar sigura daca trebuie aflata si masa solutiei,dar poti sa faci si sa-i arati profesorului.
md=5g
[tex] m_{apa} [/tex]=45g
ms=?
c=?
c=[tex] \frac{md}{ms}*100 [/tex]=[tex] \frac{md}{md+ m_{apa} } *100[/tex]=[tex] \frac{5g}{45g+5g}*100 [/tex]=[tex] \frac{5g}{50g} *100[/tex]=[tex] \frac{5}{5} *10[/tex]=10%
[tex] m_{apa} [/tex]=45g
ms=?
c=?
c=[tex] \frac{md}{ms}*100 [/tex]=[tex] \frac{md}{md+ m_{apa} } *100[/tex]=[tex] \frac{5g}{45g+5g}*100 [/tex]=[tex] \frac{5g}{50g} *100[/tex]=[tex] \frac{5}{5} *10[/tex]=10%