Ответ:
дано
m(ppa H2SO4) = 400 kg
W(H2SO4) = 80%
--------------------------
m(SO3)-?
SO3+H2O-->H2SO4
m(H2SO4) = 400 * 80% / 100% = 320 kg
M(H2SO4) = 98 kg/kmol
n(H2SO4) = m/M = 320 / 98 = 3.27 kmol
n(SO3) = n(H2SO4) = 3.27 kmol
M(SO3) = 80 kg/kmol
m(SO3) = n*M = 3.27 * 80 = 261.6 kg
ответ 261.6 кг
Объяснение: