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Decoding of Chemistry Olympiad

Decoding of Chemistry OlympiadDecoding of Chemistry OlympiadDecoding of Chemistry Olympiad

Decoding of Chemistry Olympiad

Decoding of Chemistry OlympiadDecoding of Chemistry OlympiadDecoding of Chemistry Olympiad
  • Home
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    • Home
    • DCC
    • About
    • USNCO
      • General Overview
      • FAQs
      • Learning Objectives
      • Annotated Solutions
      • Misconception
      • Laboratory
      • Study Camp
      • National2024
    • Classes
      • Introduction
      • Registration
      • Testimony
      • National Preps
      • Summer
      • Open Classes
      • Lecture Notes
    • Resources
      • Youtube Channel
      • Blog
      • Textbooks
      • IChO
      • CChO
      • Mendeleev
      • VChO
      • WUCT&BCT
      • Other Sites
    • Consultation
      • Newsletters
      • Email
      • Discord
      • WeChat 微信
  • Home
  • DCC
  • About
  • USNCO
    • General Overview
    • FAQs
    • Learning Objectives
    • Annotated Solutions
    • Misconception
    • Laboratory
    • Study Camp
    • National2024
  • Classes
    • Introduction
    • Registration
    • Testimony
    • National Preps
    • Summer
    • Open Classes
    • Lecture Notes
  • Resources
    • Youtube Channel
    • Blog
    • Textbooks
    • IChO
    • CChO
    • Mendeleev
    • VChO
    • WUCT&BCT
    • Other Sites
  • Consultation
    • Newsletters
    • Email
    • Discord
    • WeChat 微信

Events

03/24/2025 (Mon)

DChO Open Class for USNCO National 2025

8:30 pm

-

10:00 pm ET

ZOOM (click the event details to watch the recording)

Event Details

03/24/2025 (Mon)

DChO Open Class for USNCO National 2025

Description: Dr. Chen will explain and summarize the most recent years of the National Exam Part I, focusing on the 2024 National Exam.

Time:...

Event Details

8:30 pm

-

10:00 pm ET

ZOOM (click the event details to watch the recording)

03/01/2025 (Sat)

DChO Open Class for USNCO Local 2025

8:30 pm

-

10:00 pm ET

Recording (click the event details to watch the recording

Event Details

03/01/2025 (Sat)

DChO Open Class for USNCO Local 2025

Description: Dr. Chen will discuss and summarize the most recent years of the Local Exam, focusing on the 2024 Local Exam.

Time: March 1, 202...

Event Details

8:30 pm

-

10:00 pm ET

Recording (click the event details to watch the recording

02/19/2024 (Mon, Presidents' day)

Open Class 2 for USNCO 2024

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

Event Details

02/19/2024 (Mon, Presidents' day)

Open Class 2 for USNCO 2024

Description: Dr. Chen will explain the Local 2023 Original Exam problem by problem and summarize the challenges and trends.

Time: Feb 19, 202...

Event Details

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

01/15/2024 (Mon, MLK day)

Open Class 1 for USNCO 2024

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

Event Details

01/15/2024 (Mon, MLK day)

Open Class 1 for USNCO 2024

Description: Dr. Chen will explain the Local 2023 New Exam problem by problem and summarize the challenges and trends.

Time: Jan 15, 2024 08:...

Event Details

8:30 pm

-

10:00 pm EST

Recording (click the event details to watch the recording)

04/01/2022 (Fools' Day)

Open Class for USNCO National 2022

7:30 pm

-

9:00 pm EST

registration link (click "Event Details" in the left)

Event Details

04/01/2022 (Fools' Day)

Open Class for USNCO National 2022

Description: Dr. Chen will explain the challenging problems in the USNCO National 2021 Part I, as well as summarize the trends and preparati...

Event Details

7:30 pm

-

9:00 pm EST

registration link (click "Event Details" in the left)

More Events

Recording of Open Class for USNCO 2023

Description: Dr. Chen used USNCO examples to summarize the computation and conceptual understanding of "Several Equations in the Application of Thermodynamics": Arrhenius Equation, van't Hoff Equation, Clausius-Clapeyron Equation, and Nernst Equation. [Actually, they are all related!]

Time: Feb 21, 2023 08:30 PM in Eastern Time (US and Canada) 

Level: Local Exam+

Recording of Open Classes in 2022

Open Class for Local 2022

Kahoot Practice to review Each Topic

Open Class for National 2022

Detailed Explanation to National 2021 Part I MCQs

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Sign up for Dr. Chen's National Prep Class for USNCO 2025!

  • Elite Prep for USNCO Nationals – Intensive training for Parts I, II, and III.
  • 8 Live Sessions via Zoom – Covering descriptive chemistry, organic chemistry, explanations, and reaction writing, chemical principles, etc.
  • Exclusive Mock Exams – High-quality tests and in-depth explanations tailored for Parts I & II.
  • Expert Guidance – Learn from Dr. Chen, a top chemistry educator and USNCO mentor.
  • Structured Curriculum – Engage in lectures, discussions, and rigorous homework.
  • Looking for high quality National Mocks - sign up for the DCC 2025.


Sign up by Mar 24, 2025 | Class starts on Mar 23!