When 1.0 M aqueous solutions ofKl, NaCzH302, and Pb(N03)2 are mixed together, what precipitate forms

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?