The 1972 exam was notoriously computation-heavy. As a result, the often require multiple intermediate steps, with partial credit awarded for correct logarithms or slide rule mantissas.
Molar mass CaC₂ = 40.1 + (2 × 12.0) = 64.1 g/mol Moles = 25.0 g / 64.1 g/mol = 0.390 mol (using slide rule: 25/64.1 ≈ 0.390) 1972 ap chemistry free response answers
The 1972 AP Chemistry exam predates the modern scoring guidelines, rubrics, and the 9-point FRQ format used today. Official scoring standards from that year are not published online by the College Board. The "answers" below are derived from worked solutions by chemistry educators over the years, focusing on the correct chemical principles and final calculations. The 1972 exam was notoriously computation-heavy
Need more vintage AP content? Check back for our upcoming articles: “1973 AP Physics Free Response Answers” and “A Complete Guide to 1960s AP Biology Essays.” Official scoring standards from that year are not