Sulfur dioxide will react with water to form sulfurous acid : SO2(g) + H2O(l) → H2SO3(l) What mass of sulfur dioxide is needed to prepare 27.86 g of H2SO3(l)?

Answer 1

how many moles of H2SO3 in 27.86 grams?
The equation says you will need that many moles of SO2. Convert that to grams.

Answer 2

28.77

Answer 3

42.24g