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Back to Introduction to Chemistry: Reactions and Ratios

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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251 - 275 of 303 Reviews for Introduction to Chemistry: Reactions and Ratios

By Joshua S G

Aug 1, 2020

Amazing!!

By PRIYA P

Jun 5, 2020

Wonderful

By PARTH P

Jun 5, 2020

Excellent

By PRIYA P

Jun 5, 2020

EXCELLENT

By PARTH P

Jun 5, 2020

Excellent

By Islam M E S

Feb 7, 2017

Excellent

By Haider A

Aug 28, 2016

Very good

By Lingyu Z

Apr 17, 2020

Helpful!

By jahanzeb a

Aug 9, 2023

amazing

By neel s

Jul 17, 2017

Love it

By 佐々木駿

Jun 17, 2022

Great!

By Pei X L

Jun 11, 2020

Thanks

By Gyanendra

Jun 4, 2017

Great!

By ranjitha r

Jan 7, 2021

Good

By M Z U M

Sep 26, 2020

Good

By Simonas M

Sep 26, 2020

good

By Dr. M B

May 10, 2020

good

By Brenno F D S S

May 10, 2021

god

By Uri S

Apr 18, 2022

:)

By Safira r

Aug 30, 2022

O

By Carlo T

Nov 16, 2020

Overall, the course is a very good introductory course. There are many great theoretical exercises and real-life examples to their discussions. I also like how they simplified the mole concept into an easily digestible one. However, at times, the course gives examples that students that are not yet acquainted with chemistry may have a hard time processing. It also discusses some concepts that are tied to some chemistry concepts that the course decided not to dabble with, e.g., using examples to show Lewis electron-dot notation and electron pairs but not thoroughly discussing how that works. Because of this, I would not recommend this to students that don't have any idea about chemistry, or to those that hadn't learned it in their secondary schools.

By Josh F

Nov 17, 2019

On the whole this course was worth my time. I had never taken a chemistry class and I was looking for a course to prepare me for other science courses that required a background in basic chemistry. I found the course very easy and quick. All concepts were well explained, except those in week 6, where a plethora of new and basically unexplained notation (Lewis Dot models, chemical structure diagrams) made the lectures harder to follow. I expect that I will learn more about that notation in the second course.

By nijitha k

Sep 12, 2020

It was a wonderful experience. All lectures were excellent. Simple and clear kind of lecturing it was very easy and interesting to follow. Sometimes i feel sad if my phone shows low battery power during the class time. I hope i could attend almost week exercises well. Demonstrations also very helpful. I spent time for getting better mark by repeating exams when ever my percentage become low. Special thanks to Prof. Dorian Canelas.

By Janay C

Nov 4, 2021

I took the course as a complete beginner. This was my first chemistry course and I enjoyed the professor and her teaching style. I believe this course is best suited for students who possess prior knowledge of chemistry concepts. I would definitely recommend this course to any one who is looking for a challenge. After successfully completely this course, I am very eager to enroll in a chemistry class at my community college.

By Sanni K

Sep 15, 2022

I have not had chemistry for about 12 years but was able to follow the course without any problems in order to review the basic concepts of chemistry. It's really for beginners, but still makes you feel the progress of what you've learned while advancing the class. A good balance between theoretical concepts and stoichiometrical calculation. Thanks!!