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

1,119 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


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 290 Reviews for Introduction to Chemistry: Reactions and Ratios

By Evangelos B

Aug 18, 2021

Overall a great course that gives you a good look through fundamentals of chemistry.

By Shin H

Jan 13, 2021

It's a recommendable course for those who are to get basic knowledges for chemistry.

By 이동혁

Nov 18, 2018

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

By Joaquín C

Aug 23, 2021

hI, excellent chemistry course. It is understood very well, it is very patchable

By Smaiel H

Jun 6, 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.


Mar 31, 2022

Oh! What a nice course! I really like chemistry and it's a lot of fun here! ;)

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 8, 2020

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

By Salma F A

Oct 1, 2020

thanks for your great efforts!

the best general course.. All the Best!

By Saugat B

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 Moayad S

Feb 7, 2021

Great course if you want to refresh or get started for the college!

By Semra G

Feb 2, 2021

Prof. Dorian A. Canelas was amazing! i will never miss her courses!

By Jonathan A R M

Oct 19, 2020

this is a great course to gain new knowledge and reinforce old ones

By Ahmed Z

Jun 18, 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 Carlo D S

Aug 17, 2021

A great revamp for those who want to reinforce Chemistry concepts

By Michael P

Sep 26, 2020

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

By Crystal R

Jan 21, 2021

I wont lie, it was not easy! However, I learned a lot. Thank you

By sangeeta k

Dec 2, 2022

Excellent content. Simple language and good number of examples.

By Sandi G

Mar 17, 2021

Prof Colenas explainsteh concepts really well. And she's funny!