Question

Aflati cantitatea de sare care se gaseste in 72 kg solutie cu concentrstia de 15%

Answer 1

$c \: nacl = \frac{md \: nacl}{ms \: nacl} \times 100 \\ 15 = \frac{md}{72} \times 100 \\ md = \frac{15 \times 72}{100} \\ md = \frac{1080}{100} \\ md = 10.8g \: nacl(sare)$

Sper ca te-am ajutat...

Answer 2

masa dizolvant = md

masa solutie = ms

c = concentratia

ms = 72 kg

c = 15 %

md = ?

md= ms*c/100

md= 72kg*15/100

md= 1080kg/100

md = 18 kg