How do you properly make a science fair board

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

What will most likely happen when two bromine atoms bond together?