Dr. Chen proudly supported 24 students to win top awards at the 2024 USNCO National.

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
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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
      • 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
    • 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 for registration link)

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 for registration link)

03/01/2025 (Sat)

DChO Open Class for USNCO Local 2025

8:30 pm

-

10:00 pm ET

ZOOM (click the event details for registration link)

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

ZOOM (click the event details for registration link)

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

Open Class 2 for USNCO 2024

8:30 pm

-

10:00 pm EST

ZOOM (click the event details for ZOOM link)

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

ZOOM (click the event details for ZOOM link)

01/15/2024 (Mon, MLK day)

Open Class 1 for USNCO 2024

8:30 pm

-

10:00 pm EST

ZOOM (click the event details for ZOOM link)

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

ZOOM (click the event details for ZOOM link)

02/21/2023 (Tuesday)

Open Class for USNCO 2023

8:30 pm

-

9:30 pm EST

ZOOM (click the event details to watch the recording)

Event Details

02/21/2023 (Tuesday)

Open Class for USNCO 2023

Description: Dr. Chen will use USNCO examples to summarize the computation and conceptual understanding of "Several Equations in the Applica...

Event Details

8:30 pm

-

9:30 pm EST

ZOOM (click the event details to watch the recording)

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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Free  – No cost to join! Get expert guidance to excel in the USNCO 2025 Local and National Exams.

Exam-Focused Approach – Detailed explanations and summaries of recent USNCO exams, including key concepts, problem-solving strategies, and extensions beyond the test.

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