Chemistry 221

CH 221Z Announcements

November 14, 2025

Items Due During Week 9:

Section L1: Due in Recitation on Monday, November 17 at 1:10 PM in AC 2501
• The "Empirical Formula" lab
• Your Class Presentation Paper
• You will give your Class Presentation to your lab section in AC 2501 on Monday, November 17.
• There will be no lab, problem set or quiz this week.

Section L2: Due in Recitation on Tuesday, November 18 at 8:30 AM in AC 1303:
• The "Empirical Formula" lab
• Your Class Presentation Paper
• You will give your Class Presentation to your lab section in AC 1303 on Tuesday, November 18.
• There will be no lab, problem set or quiz this week. We will have a lecture on Thursday at 8:30 AM.

Section L3: Due in Recitation on Wednesday, November 19 at 1:10 PM in AC 2501
• The "Empirical Formula" lab
• Your Class Presentation Paper
• You will give your Class Presentation to your lab section in AC 2501 on Wednesday, November 19.
• There will be no lab, problem set or quiz this week.

Section L4: Due in Recitation on Friday, November 21 at 1:10 PM in AC 2501
• The "Empirical Formula" lab
• Your Class Presentation Paper
• You will give your Class Presentation to your lab section in AC 2501 on Friday, November 21.
• There will be no lab, problem set or quiz this week.

All Sections:
• Make sure you attend your regularly scheduled lab section this week. Changing sections for any reason results in a point penalty, so attend your regular section!

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This is Class Presentations, and I always look forward to seeing your presentations and reading your papers. As always, if you have any questions, contact me.

Here's what is happening in week 9 of CH 221:

• This is Class Presentations week!
  • This upcoming week you will be giving your Class Presentation and submitting your final Class Presentation paper. The details differ depending on which section you are in, so see below for more information. And remember, the Empirical Formula lab is due this week as well.
  • Note that you MUST turn in your paper and present your presentation to your regularly scheduled lab section this week. Changing lab sections for any reasons will result in a point penalty, so make sure you attend your regular lab section this week!
• Class Presentations:
  • The Paper: Details on the requirements for the written paper can be found in the Class Presentations page and in the FAQ.
  • The Presentation: You will be giving a roughly five minute presentation to your class section during recitation (Section L1: Monday, November 17 at 1:10 PM in AC 2501; Section L2: Tuesday, November 18 at 8:30 AM PM in AC 1303; Section L3: Wednesday, November 19 at 1:10 PM in AC 2501; Section L4: Friday, November 21 at 1:10 PM in AC 2501
  • We will start promptly so make sure you are there on time. A part of your grade includes full attendance on this day, so be there and don't be late, ok?
  • During your presentation you can use the podium Windows computer in AC 2501/AC 1303 for PowerPoint, Google Slides, etc.-type presentations, or you can just 'chalk talk' your presentation (use the chalk board, or visuals, etc.) Any questions? Let me know!
  • If you plan on using a cloud based presentation system (Google Slides, PowerPoint online, etc.) you will need to log in to your online accounts to access presentations, so make sure you know your username and password to log in, etc. You can also bring a USB thumb drive and use it to access your presentation (this is a great back up method and is recommended!) I will not log in to my MHCC account to access your presentations, so make sure you have this information ready to access on presentation day.
  • A part of your grade will be completing and turning in the "Class Presentation Reviewer Guide." I will provide the guide before the presentations start (or you can bring one yourself, your call).
  • Your Class Presentation paper will be due at the time of your Class Presentation. Print it before class starts; printing after would invoke a point penalty. If you do not present on your assigned Class Presentation day, there will be a significant point penalty.... so make sure you attend and present on your lab day, ok?
  • The Empirical Formula lab is also due at the time of your Class Presentation.
  • If you have any questions, please let me know!
• We will not be completing any quizzes, labs or problem sets this week.

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Here's a preview of what's going to be happening during Week #10:

• Nothing is due! Section L1 will have a lecture on Monday (November 24) morning at 9 AM in AC 1303, but there will be no labs this week for any section.
• Mt. Hood Community College is closed from Wednesday, November 26 through Friday, November 28 for Thanksgiving. Have a wonderful break!
• Possibly you could start looking over Chapter 6 material and/or Problem Set #6?

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