How did Edward Teller died?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need