Barium chlorate (ba(clo3)2) breaks down to form barium chloride and oxygen. what is the balanced equation for this reaction? when counting atoms in parentheses, multiply all subscripts by the number outside the parentheses to get the number of atoms. bacl3(s) + o2(g) → bacl(s) + cl2(g) + o2(g) 2baocl3(s) → 2bacl(s) + cl2(g) + o2(g) ba(clo3)2(s) → bacl2(s) + o2(g) ba(clo3)2(s) → bacl2(s) + 3o2(g) 2ba(clo3)2(s) → bacl(s) + 6o2(g) ba(clo)2(s) → bacl2(s) + o2(g)