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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. JPMIPA 2022, 27 (1), 1-8. https://doi.org/10.18269/jpmipa.v27i1.49957.