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CP16 – Formulas and Masses

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The world is a magical place

Date

  • Monday, February 12th

Class Business

  • Questions?
  • Collect LNB

Recap Last Class – Percent Composition

  • given formulas
  • asked for a mass breakdown
  • assume 1 mole of the substance
  • process
  • new example: propane (C3H8)

New Idea – Empirical Formulas

  • given mass percent
  • determine formula
  • empirical vs. true formula
  • examples

Empirical Formulas – Process

  • assume 100-gram sample
  • percent to grams
  • gram to moles
  • divide by smoles
  • multiply ’til whole

Practice

  • practicing

Next Class Meeting = Test

  • Objectives: Unit 7 & Unit 8 (let’s look now)
  • Practice Problems in textbook
  • I will post last year’s test as well

Homework

  • Study for the test

Information

This entry was posted on 2018-02-11 by in CP1718 and tagged , , , .

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