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Back to Introduction to Chemistry: Reactions and Ratios

Learner Reviews & Feedback for Introduction to Chemistry: Reactions and Ratios by Duke University

4.7
stars
1,374 ratings

About the Course

This is an introductory course for students with limited background in chemistry; basic concepts involved in chemical reactions, stoichiometry, the periodic table, periodic trends, nomenclature, and chemical problem solving will be emphasized with the goal of preparing students for further study in chemistry as needed for many science, health, and policy professions....

Top reviews

IC

Jul 11, 2019

Excellent course. Although, it was very challenging to me to complete it and I had to repeat some of the videos, I am very happy that I decided to take it. It helped me to repeat my knowledge.

NM

Sep 14, 2025

Excellent course!!! I enjoyed the historical background the lecturer used including the brief synopsis of the Chinese emperor consuming mercury pills to gain immortality.

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226 - 250 of 347 Reviews for Introduction to Chemistry: Reactions and Ratios

By Ong C W

•

May 9, 2020

Good course for

High School Chemistry

By Deleted A

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Jun 21, 2020

Really good course! I learned a lot!

By Yousef A

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Jun 21, 2020

a very fruitful course of chemistry.

By Abay P A

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Oct 10, 2024

Good and very nice and work it easy

By Natalia F

•

Nov 14, 2023

Great and useful course, thank you!

By Sherry H

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Mar 25, 2019

Very informative and great teacher!

By Alfonso O

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Apr 21, 2017

Great class! Absolutely enjoyable!!

By Marionel E

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Sep 23, 2020

A good course, easy to understand.

By Yoe

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Apr 18, 2017

nice chemical course for beginners

By Bryan S

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Jul 18, 2021

Alot of work but this was great!

By Fernando D G

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May 5, 2020

Great Teacher, Explains excellent

By SeonMi J

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May 21, 2020

I enjoyed this course very much.

By zoha a

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Jul 10, 2021

This course was greatly helpful

By Luz A A V

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Feb 7, 2021

Muy buen curso. Bien explicado.

By Farsana. O P

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Jun 14, 2020

Nice presentation. Very helpful

By Rodrigo N

•

Jun 27, 2025

Great professor, learned a lot

By HanMin Z

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Oct 24, 2021

A basic course but beneficial.

By Eduardo A C

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Dec 29, 2017

AMAZING! I HAVE LEARNED A LOT!

By Muhammad N A

•

Apr 6, 2025

this course is really awesome

By A D

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May 28, 2020

really cleared up the basics!

By Kessia D R

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Feb 2, 2026

Very good course and helpful

By Haris Č

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May 6, 2025

Amazing introductory course!

By Nyein C

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Oct 8, 2021

good course and thank sayars

By Johanna H

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Jan 28, 2017

I only wish there was more.

By Bassel A H

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Jan 9, 2021

Great course and teacher !