AP Chemistry worksheet on mole calculations with handwritten solutions for problems involving CH₄, CO₂, and H₂O at STP.
A worksheet titled "Mole Calculations - Difficulty Level 3" from a South Pasadena AP Chemistry class, showing six problems with handwritten solutions in red ink. The problems involve calculating mass, volume, and number of molecules for various gases and compounds at STP, using mole conversions and molar mass.