Week 22:  7 February to 11 February 2022

7 February 2022:

In Class:  Percent Composition (Chapter 5:19 to 5:20).

  •  % composition by mass = 
  • mass of part
     mass of whole 
  •  × 100
  • Expectations:  Students will be able to calculate the percent composition in a chemical formula.

    Due:  The Empirical and Molecular Formula Worksheet.

    Homework:  Finish the Percent Composition Worksheet.  Here is the Percent Composition Answer Key to help you.

    8 February 2022:

    In Class:  Quiz on gfm, empirical, and molecular formulas.

    Calculating mass from moles and moles from mass.  (Chapter 5:20 to 5:21)

  •  number of moles = 
  •  given mass
     gram-formula mass 
  • Expectations:  Students will be able to calculate mass mole problems.

    Due:  The Percent Composition Worksheet.

    Homework:  Finish the Moles and Mass Worksheet.  Here is the Moles and Mass Answer Key to help you.

    9 February 2022:

    No Class:  Chemistry does not meet on Wednesday.

    10 February 2022:

    Lab 18b:
    Analysis of the Precision in Gravimetric Measurement Lab from an Excel spreadsheet.

    Expectations:  Students will be able to analyze data in an Excel file.

    11 February 2022:

    In Class:  Adding coefficients to balance formula equations.  (Chapter 5:4 to 5:6)

    Expectations:  Students will be able to add coefficients to balance formula equations.

    Due:  The Moles and Mass Worksheet.

    Homework:  The Balancing Equations Worksheet.  Here is the Balancing Equations Answer Key to help you.

    Note:  3rd quarter ends 8 April 2022.