Chevron Left
Back to Introduction to Chemistry: Reactions and Ratios

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

710 ratings
191 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.

Filter by:

101 - 125 of 187 Reviews for Introduction to Chemistry: Reactions and Ratios

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.


By Prashant K M

Apr 11, 2018

It was a very interesting course. I enjoyed it a lot!

By Jose C

Dec 27, 2017

Muy bueno para aprender la introducción a la química.

By Omkar P

Oct 04, 2020

very understandable contents and excellent teaching

By Nataliya C

Aug 02, 2020

Amazing Professor. She explains everything so good!

By Amira A M

Aug 14, 2020

Important course with good and various information

By kristell

Jul 10, 2019

the teacher is the best, also she is really funny

By Albert K

Jul 31, 2020

Thank you so much. This is excellent course


Jun 15, 2020

This course has helped to refresh my basics

By Afsar u D

May 13, 2020

it is excellent course for basic chemistry

By Dr. S J M

Apr 30, 2020

The course was helpful and encouraging ...

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 04, 2020

the lessons are very useful and exciting

By Gayathry B

May 07, 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 09, 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!!