Răspunsuri

2014-11-11T15:14:49+02:00
M apa ad = ?
c = 40 %
cf = 25 %
md = (c * md ) : 100
md = (40 * 120 ) = 48 g
cf = (md * 100 ) : (ms + m apa ad)
25 = 4800 : 120 + m apa ad
25= \frac{4800}{120 + m apa ad}
25 * 12 + 25 * m apa ad = 480
300 + 25 m apa ad = 480
25 m apa ad = 180 
m apa ad = 180 : 25 = 7.2 g 
S-au adaugat 7.2 g apa