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

4.7
stars
1,188 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

RG

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.

M

Sep 4, 2023

The teaching method of Dr. Dorian canelas was very simple and impressive. I have learnt a lot and much enjoyed during the lecture and Practical demonstration. I recommend it to all chemistry learner.

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51 - 75 of 303 Reviews for Introduction to Chemistry: Reactions and Ratios

By María B A M

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Feb 5, 2024

Muy bien por el contenido, solo tuve problemas en un cuestionario, que daba las respuestas en español y me las calificaba incorrectas, debido a que para verificar las respuestas, el formato las tenía en inglés, hasta que di las respuestas en inglés tuve éxito!

By Victor T

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May 18, 2020

The course is an excellent one. The tutor is so good to the extent that I never had to comment or ask question from the beginning to the end. I even finished it within 3 days. REGISTER TODAY AND YOU WILL NOT HAVE ANY CAUSE TO REGRET. I can assure you!!

By Najm C

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May 15, 2021

The best course that can one have for introduction to chemistry, reached by a real chemist!

Thank you, Pr. Dorian for this great course. I'm grateful that I had the opportunity to learn chemistry through you.

See you in the next course, no doubt :) !

By Aldrich W

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Jun 7, 2021

I really enjoyed this introductory chemistry course with Prof. Canelas! Prof. Canelas always explains these concepts and theories clearly, and the weekly quizzes are an extremely useful tool to test the knowledge and enhance the understanding.

By Albriz M B

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Jul 21, 2020

This is a very helpful course for me to review all our chemistry topics in high school. I also love how the professor teaches the concepts because I can easily understand them. The quizzes and exams really challenge my problem-solving skills.

By Andy Y

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Oct 25, 2019

What a great lesson and teacher!! I have learned a lot on this course. Hope to learn from this teacher in other courses. Also, I want to thank the teacher about spending so much time on preparing the knowledge that teach to us. Thanks a lot!!

By Youssef M A

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Jul 12, 2020

this is an amazing introductory course to chemistry as I have learned a lot of things and how to change from ratios, how to naming compounds, how to calculate the solubility product, periodic table, and some trends and a lot of other things

By Sophie V

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Oct 7, 2021

Indeed an introductory course but is also suitable for adult learners. Lectures are logically ordered and clearly explained. Separation of content into weeks is motivational. Highly recommended for those who want to get into Chemistry.

By Nikitha R

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Aug 13, 2022

It's a great course! First of all, this course helped me understand and open my eyes to the world of chemistry through the concept of energy. This has helped me learn a lot. I've also gained a lot of stoichiometric skills as well.

By Roniel V

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Mar 2, 2019

I learned so much about Chemistry! I really did not understand it in high school since I had a first year teacher. But now I know so much. I'm going to buy the text the professor recommended at the beginning of the course.

By Miranda A G V

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Aug 2, 2020

I loved with all my heart the way Dr. Dorian teaches, it seemed to me that I learned things very quickly as if they were very simple. I learned a lot, I enjoyed and took advantage of it, very good rate for this course.

By Emmanuel E

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Oct 14, 2020

Dr. Canales, takes time to explain baffling calculations and that helped me pass my course. I'll recommend she review lecture on acid base and redox reaction, lecture note was too short with few examples to understand.

By Athira C

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May 14, 2020

The course is both simple and informative. The instructor is very helpful in making us understand every small bits of information and she presented everything with examples which made me interested to this course.

By Muhammad S

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Sep 5, 2023

The teaching method of Dr. Dorian canelas was very simple and impressive. I have learnt a lot and much enjoyed during the lecture and Practical demonstration. I recommend it to all chemistry learner.

By Roberto R

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May 9, 2020

The best explanations I've ever heard, everything felt so easy to understand. Also the humour of Ms. Dorian Canelas was really great and brought a very positive feeling when completing the course.

By Silviu T P

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Nov 27, 2021

I find it very clearly presented and well organized. I really enjoyed it. Thank you! I liked it so much that I decided to translate it in my mother language so I can refresh the notions learned.

By Jennifer S

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Jul 2, 2019

Excellent introduction. Engaging lectures, clear demonstrations and approachable problem sets. I love that everything for this course works from my phone. THANK YOU FOR OFFERING THIS COURSE!!!!!

By Suzette B

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Aug 14, 2021

I did not like chemistry because I had failed my previous chemistry 114 class in college. Taking this course have help me to understand the basics of chemistry. I'm grateful.

Thank You.

By Swapna S

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May 18, 2020

Enriched with knowledge .Thank you so much Prof Dorian. I have watched the again and again that you become so familiar . You are one of my favorite mentors . Your work is priceless.

By Muhammad A R

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Aug 9, 2019

An exceptional course to revise previous concepts. many a times strengthened my previously vague concepts. The interviews and especially the practical videos were very enlightening.

By alex p

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Sep 15, 2023

Got a far better understanding of basic chemistry almost 20 years after finishing high school. Many thanks to Prof. Dorian Canelas and to Duke University for creating this course.

By Sravanthi.M

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Aug 18, 2020

I really enjoyed this course well,and I learned the basics of chemistry on reactions and ratios. Prof.Dorian.A Canelas thaught the topics in easiest and in understandable way.

By Alexandr S

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Jan 17, 2021

To be honest, I knew a lot of the course (the program of the school course in my country provides for all this), but this course opened my eyes to many things in a new way

By Gabriele M

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Jul 29, 2022

It was a very interesting and pedagogically well prepared course, which made much fun. Thank you very much Prof. Dorian Canelas and all people, who worked on this course.