Question

amestecam 160 ml otet cu 1l apa
C=?

Answer 1

probabil ca vrei sa afli c%

vd= 160ml 
v,apa= 1000ml
vs= vd+v,apa=1160ml
c=vdx100/vs........................calculeaza c%, in procente volumetrice !

Answer 2

$c = \frac{md \times 100}{ms}$
md= masa dizolvat
md= 160ml otet
m apa= 1l =1000ml

$ms = md + m \: apa$
ms= 160ml+1000ml
ms= 1160 ml

$c = \frac{md \times 100}{ms}$
$c = \frac{160 \times 100}{1160}$
c= 13,79%