3) using a periodic table, what element q most likely to be?

i don't understand what they are asking plz ?

There isn't a Q on the periodic table but, there is a element with the letter Q in it and that is ununquadium (or otherwise known as Flerovium).

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o