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Marsilio Mark Langella has been teaching college chemistry for 34 years. He is a 31-year retired AP Chemistry instructor at Mahopac High School in New York and an active adjunct chemistry professor at Westchester Community College and now full time Clinical Laboratory Professor at Â鶹ÉçÇø.   He received a BA in Chemistry from Manhattan College, and a MA in Science Education from Lehman College. He is also a NYS certified chemistry and chemical technology instructor. He is also the author of numerous published experimental kits and AP chemistry labs for FLINN Scientific. He is also a developer for Mini-Concepts Custom Designed Chemistry Lab Kits.