Răspunsuri

2014-11-14T19:53:33+02:00
Ms=500 g
c= 20%
ma=100 g

md= ms-ma= 500-100=400 g
2014-11-14T19:57:39+02:00


C= masa solutiei(ms)+ masa apei(H2o)x 100

C=20+100-100=20 g atat mie mia aratat profa si cred ca asa ar si facut si ea