Brachot on Food and on Smell

Do We Need to Make a Bracha on Chewing Gum?

“Baruch Hu U’varuch Shemo” in Zimun

It is unclear to me whether one is supposed to say “Baruch hu u’varuch shemo” at the end of zimun and if so, who is supposed to recite it. What is proper?

The Borders: How Much is Ours

Pizza, Pretzels and Pastry

When is the Bracha Hamotzi and when is it a Mezonot?