w(CuSO4)=7m(rastvora)=350gramm=>
m(CuSO4)=w*m(rastvora)=350*7\100=24,5gramm
m(H2O)=m(rast)-m(CuSO4)=350-24,5= 325.5gramm
w(CuSO4)=7m(rastvora)=350gramm=>
m(CuSO4)=w*m(rastvora)=350*7\100=24,5gramm
m(H2O)=m(rast)-m(CuSO4)=350-24,5= 325.5gramm