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

4.7
stars
1,267 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.
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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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301 - 317 of 317 Reviews for Introduction to Chemistry: Reactions and Ratios

By M L

Feb 9, 2018

It's a very good course and

clear teaching!

By JESSIE C

Apr 3, 2021

Well explained course. Thank you.

By Amartya M

Oct 28, 2020

Great course for concept clearance

By 王廷瑋

Jul 17, 2017

clear concept explanation

By Ullah H

Oct 11, 2019

helpful for the biginner

By Ben D

Nov 17, 2018

I rather enjoyed it. :-)

By Грязев В В

Dec 16, 2016

понятный и доступный

By John F

Jul 1, 2020

a good introduction

By Nafiul A

Jun 17, 2020

I loved this course

By Eb E

Nov 12, 2019

Cool class!

By Sara b

Nov 6, 2024

Good work

By Nicholas F

Sep 18, 2022

good

By Nancy L

May 1, 2021

I've found easier tutorials on YouTube for certain subjects but I really enjoyed the demos!

By mohammad o t

Mar 10, 2021

Very long videos

By Armon A

Jul 25, 2021

The lectures were difficult to follow, and the material on the tests were not covered well.

By rverker

Feb 2, 2025

It's really intolerable these MOOCs like this one that don't offer PDF support. The videos skim over the subjects, are messy and don't give enough examples. The trainer scribbles on the slides, making them illegible. The quizzes are all-or-nothing (you retake everything if you don't reach the threshold) and the advanced quizzes are ridiculous and useless. What's more, they're not corrected, so it's hard to understand your mistakes and improve. On the other hand, you can take them 15 million times if you have the patience.

By Nicolás C M

Aug 14, 2020

It say introduction, but it is more advanced that it seems