Question

calculati volumul de solutie de acid sulfuric de concentratie 30% si densitatea ro=1,3g/ml,Ce contine dizolvat 30 de grame de acid sulfuric

Answer 1

c=md/ms*100
ms=md*100/c=30 *100/30=100g
ρ=ms/v 
v=ms/ρ=100/1,3=76,92 ml