Week 23: 22 February to 26 February 2021

22 February 2021:

**In Class:** Empirical and Molecular Formulas (Chapter 5:3 to 5:6) and Percent Composition (Chapter 5:19 to 5:20).

mass of whole

Expectations: Students will be able to calculate molecular formulas.

Expectations: Students will be able to calculate the percent composition in a chemical formula.

**Homework:** Finish the
Empirical and Molecular Formula Worksheet.

Here is the
Empirical and Molecular Formula Answer Key to help you.

23 February 2021:

**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.

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

gram-formula mass

Expectations: Students will be able to calculate mass mole problems.

**Due:** The
Empirical and Molecular Formula Worksheet.

**Homework:** Finish the
Percent Composition Worksheet.

Here is the
Percent Composition Answer Key to help you.

24 February 2021:

**In Class:** Finish balancing chemical equations. (Chapter 5:4 to 5:6)

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

**Due:** The
Percent Composition Worksheet.

**Homework:** Finish the
Moles and Mass Worksheet.

Here is the
Moles and Mass Answer Key to help you.

25 and 26 February 2021:

**Lab 20a:**

Use the double block to complete data collection for the
Composition of a Hydrate Lab.

Expectations: Students will be able to use mole ratios to calculate molecular formulas.

**Due:** The
Moles and Mass Worksheet.

**Homework:** Begin the
Balancing Equations Worksheet.

Here is the
Balancing Equations Answer Key to help you.

**Note:** 3^{rd} quarter ends 8 April 2022.