Răspuns:
Explicație:
ms=500g sol . H2SO4
c=49%
VSO3
-se afla md H2SO4
md= c.ms :100
md=49 . 500: 100=245 g H2SO4
xg 245g
SO3 + H2O = H2SO4
80g 98g
x=80. 245: 98=200g SO3
n=200g : 80g/moli=2,5 moli SO3
VSO3=2,5 moli . 22,4L/moli=56L
MSO3=32+ 3.16=80-------> 80g/moli
MH2SO4=2+32+4.16=98------>98g/moli