All non-unique item rewards are given in a quantity proportionate to the Lone Wanderer's level, meaning the player character will receive more of some items at higher levels. Though each chapter is generally a unique quest, they all share common attributes for their rewards.
Moira Brown, the owner of Craterside Supply in Megaton, wants someone to do some dangerous research for a book she is writing entitled The Wasteland Survival Guide. Reward: XP, discount at Craterside Supply and the Dream Crusher perk