“ STUDENTS’ CONCEPTIONS, TROUBLESOME KNOWLEDGE, AND THRESHOLD CONCEPT OF CATALYST EFFECT ON REACTION RATE: STUDENTS’ CONCEPTIONS, TROUBLESOME KNOWLEDGE, AND THRESHOLD CONCEPT OF CATALYST EFFECT ON REACTION RATE”. 2022. Jurnal Pengajaran Matematika Dan Ilmu Pengetahuan Alam 27 (1): 1-8. https://doi.org/10.18269/jpmipa.v27i1.49957.