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

800 ratings
209 reviews

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

Aug 19, 2020

Thank you Professor Dorian A. Canelas! It made me much more easier to understand the basic principles of chemistry and it builds me a lot of confidence in answering some of the problems in chemistry.

Jun 12, 2020

It is a wonderful course for Middle school students. A first course in Chemistry, for the gifted students who will do AP Chemistry. Not suitable for adult learners who need an advanced introduction.

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126 - 150 of 204 Reviews for Introduction to Chemistry: Reactions and Ratios

By Liz C

Jun 19, 2017

Thanks Dr Canelas! You gave me confidence.

By Mauritius X

Oct 20, 2017

I learned something new. That was my goal

By Mohammad t d

Jul 4, 2020

the lessons are very useful and exciting

By Gayathry B

May 7, 2020

I'm really glad to joined in this course

By Proshanta R

Aug 23, 2020

I have learn about many unknown things

By Carlos A C A

Aug 19, 2020

Excellent! thanks for the opportunity!

By Ong C W

May 9, 2020

Good course for

High School Chemistry

By Aline M d O

Jun 21, 2020

Really good course! I learned a lot!

By Yousef A

Jun 20, 2020

a very fruitful course of chemistry.

By Sherry H

Mar 24, 2019

Very informative and great teacher!

By Alfonso O

Apr 20, 2017

Great class! Absolutely enjoyable!!

By Ezeigwe M N

Sep 23, 2020

A good course, easy to understand.

By Yoe

Apr 18, 2017

nice chemical course for beginners

By Fernando D G

May 5, 2020

Great Teacher, Explains excellent

By SeonMi J

May 21, 2020

I enjoyed this course very much.

By Farsana. O P

Jun 14, 2020

Nice presentation. Very helpful

By Eduardo A C

Dec 29, 2017


By Anwesha D

May 28, 2020

really cleared up the basics!

By Johan L

Jan 28, 2017

I only wish there was more.

By Bassel A H

Jan 9, 2021

Great course and teacher !

By Francisco J

Jan 22, 2019

muy bueno y bien explicado

By Sarah J

Jan 2, 2017

Very clear and accessible!

By Yumna N

Jun 2, 2020

Excellent demonstration👍

By Kopparthy S S

Dec 31, 2019

good course for beginners

By Milan D

Jun 1, 2020

Very interesting course.