Chemistry: "Road map" question. Borax can be converted to pure boron through the series of chemical reactions shown below: Pure boron is isolated in the final step of this reaction series. The starting material Y, is a non-polar gas with terminal chlorine atoms. Compound Y (2 mol) is heated under constant H2(g) pressure (3 mol) to yield the final products, B (boron) (2 mol) and compound Z (6 mol). Compound Z is a gas that when bubbled through water will produce a highly acidic solution. Balance the equation for the reaction Y and fill in the blanks for the equation below. 2 Y + 3 H2 (g) --> heat --> 2 B + 6 Z What are Y and Z.