Iron Man Armor: Mark L

<p>So two questions:</p><p>How did Tony have part of his Mark 50 helmet left to speak to Pepper? During the Battle of Titan, Thanos completely smashed the helmet off. Did Tony use his remaining nanites to shift into part of his helmet?</p><p>What exactly was the thing that Tony gave to Cap and told to take and hide with? Was it his Mark 50 armor? If so, how, if it was almost completely destroyed by Thanos on Titan? </p>