30+ stoichiometry practice converting between moles, grams, and molecules/particles. All problems include a fence-post (dimensional analysis) grid for scaffolding with problems. Problems gradually increase complexity; starting with just grams/moles, then to moles/particles, and then using mole to mole ratios. Grids can be directly typed into, but also can be printed. These slides can be used on a whiteboard and students can solve them on individual whiteboards, can be printed out and used as st