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

682 ratings
184 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 20, 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 13, 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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76 - 100 of 179 Reviews for Introduction to Chemistry: Reactions and Ratios

By Yerkanat K

Feb 26, 2018

Professor is really good at explaining the things! I find this course awesome for starters

By Ginny H

Nov 26, 2019

I am enjoying the course, and it has been challenging; but that is what I am looking for.

By Alfonso M P

Nov 18, 2016

Thank you Dorian, I have learned a lot on the basics of chemistry and chemical reactions

By Alex K

Apr 27, 2020

Very good exercises! Nice balance between lectures and assignments. Excellent course!

By 이동혁

Nov 18, 2018

Loved all the lectures, It really helped me catching up my studies in high school.

By Smaiel H

Jun 06, 2020

It was a nice and fruitfull work from a nice teacher " Prof. Dorian A. Canelas".

By Dr. S S R

Aug 29, 2020

An excellent course for learning the basics of Chemistry and Reaction kinetics.

By Nakul B

Sep 22, 2020

Nice experience online learning was really helpful! Faculties are awesome

By Donna M M

Jul 20, 2017

This course has helped me tremendously in preparing to return to college

By Gaurav D

Jun 09, 2020

The course is very educational and prof canelas is really interesting.


Aug 27, 2019

It served me for a quick review of my high school physical chemistry.

By Pablo G C

Jul 25, 2020

Everything is well explained and the evaluations are very objective.

By Ahmed Z

Jun 19, 2017

so useful, and a professional teaching way and a genius professor.

By Fernanda P M R

Jul 17, 2020

Me encanto el curso, en general es bastante entretenida la materia

By himanshu d

Jul 29, 2017

Very Good course. It will improve the basic concepts of chemistry.

By Michael P

Sep 26, 2020

My interest in Chemistry has been renewed! Thank you Dr. Canelas!

By Abhishek P

Jun 22, 2020

Excellent Course. It rewinds me all my middle school chemistry.

By Wang Z

Dec 23, 2018

Very thorough introduction. Hope it could be more challenging

By Kitty C

Sep 18, 2017

very good for revision of topics and principles of chemistry

By Fanny M

Apr 19, 2020

very clear instruction. I was able to keep up and had fun.

By Manish T

Jul 29, 2020

It was really knowledge enhancing and interesting course.

By Davis M

Jul 26, 2020

Awesome course and instructor! I was able to learn a lot.

By Lukas K

Dec 17, 2017

I learnd many things in this cours and it was as well fun

By Kafula l

May 18, 2020

It was soo educative I enjoyed every lesson.