Chem HW - due 2/13/2015

posted Feb 12, 2015, 9:36 AM by ms.jun@fmhsnyc.org   [ updated Feb 12, 2015, 7:27 PM by FMHS Web Admin ]
  • Worksheet from class today.
    • Remember on the backside, we wrote out 3 more questions. If you did not get to write them down, here they are:
      • What is the empirical formula of caffeine?
      • Using the % composition by mass of all the elements in caffeine, show that the empirical formula in #5 is correct. (Hint: it's what we learned today - going from % comp to EF)
      • Find the molecular formula of caffeine using the EF you found above and the molecular mass of caffeine you found in #1.
  • Type up your Lab Report! - Rough Draft due at 11:59pm! FRIDAY (NOT THURSDAY!)
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