Calculate the mass of sulfuric acid that can be obtained from sulfur oxide (4) weighing 160 g.

1. We write down the reaction of obtaining sulfuric acid, preliminarily oxidizing sulfur oxide (4) to sulfur oxide (6):
2SO2 + O2 = 2SO3;
SO3 + H2O = H2SO4;
2.find the chemical amount of sulfur oxide (4):
n (SO2) = m (SO2): M (SO2);
M (SO2) = 32 + 2 * 16 = 64 g / mol;
n (SO2) = 160: 64 = 2.5 mol;
3.determine the amount of sulfuric acid:
n (H2SO4) = n (SO2) = n (SO3) = 2.5 mol;
4.calculate the mass of sulfuric acid:
m (H2SO4) = n (H2SO4) * M (H2SO4);
M (H2SO4) = 2 + 32 + 4 * 16 = 98 g / mol;
m (H2SO4) = 2.5 * 98 = 245 g.
Answer: 245 g.