J.R. S. answered 04/27/20
Ph.D. University Professor with 10+ years Tutoring Experience
I think you meant HIO3 (iodic acid) reacting with sulfurous acid, not sulfuric acid.
2HIO3 + 5H2SO3 ==> 5H2SO4 + I2 + H2O ... balanced equation
Using dimensional analysis and the stoichiometry of the balanced equation, we have...
3.52 g HIO3 x 1 mol HIO3/176 g x 1 mol I2/2 mol HIO3 x 253.8 g/mol I2 = 2.54 g of I2 formed