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Voltar para Introdução à química: reações e relações

Comentários e feedback de alunos de Introdução à química: reações e relações da instituição Universidade Duke

1,055 classificações

Sobre o curso

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....

Melhores avaliações


19 de ago de 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.


12 de jun de 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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226 — 250 de 272 Avaliações para o Introdução à química: reações e relações


5 de jun de 2020



5 de jun de 2020



5 de jun de 2020



5 de jun de 2020


por Islam M E E

7 de fev de 2017


por Haider A

29 de ago de 2016

Very good

por Lingyu Z

17 de abr de 2020


por neel s

17 de jul de 2017

Love it

por 佐々木駿

17 de jun de 2022


por Pei X L

11 de jun de 2020


por Gyanendra

4 de jun de 2017


por ranjitha r

7 de jan de 2021


por M Z U M

26 de set de 2020


por Simonas M

26 de set de 2020


por Dr. M B

10 de mai de 2020


por Brenno F D S S

10 de mai de 2021


por Uri S

18 de abr de 2022


por Carlo T

16 de nov de 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.

por Josh F

17 de nov de 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.

por nijitha k

12 de set de 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.

por Janay C

4 de nov de 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.

por Rohan H

9 de ago de 2018

Quality course. Very basic in material but fabulous to understand nomenclature and other technical necessities. I used it to prepare for a honors chemistry course I am taking in my sophomore year of high school. It, in my opinion, is perfect for that use.

por Lucille G

20 de ago de 2020

helpful course, but advanced problem sets are sometimes much more difficult than concepts shown in video sessions

por Crystal Q T Z

29 de dez de 2017

Clear explanations and an excellent course for beginners. Very slow to begin, but informative and thorough.

por Michael B

18 de fev de 2017

There were some errors in the video playback, one entire lesson near the end seemed like it was skipped.