question: Q:Sulfurous acid is a weak acid, while sulfuric acid is a much stronger acid because? 
  A:the sulfur in sulfuric acid is more electronegative than the sulfur in sulfurous acid;B:sulfuric acid has more oxygen atoms in its formula;C:the O–H bonds in sulfuric acid are much weaker than those in sulfurous acid;D:sulfurous acid has its hydrogen atoms bound directly to the sulfur atom