V1= 1909,09 litr
Объяснение:
C1* V1=C2 * V2
C1= 88% H2SO4
V1=? litr
C2=4% H2SO4
V2= 42 m3 = 42000 litr
V1= (C2 * V2) / C1 = (4*42000)/88 = 1909,09 litr
