i have learned new things and words ... cool videos. thnx ..

hey you come lecture our prof.!

im in chemistry right now and you are helping me out a ton! my teacher is super boring and you make chem fun and interesting!

love you sir you help review the fastest, and also when i am sick you help me catch up to my advanced placement class. you and my teacher are so similar

You are the reason I have passed high school chemistry. Not even kidding.

sucks that you're not my chem prof : (

you are amazing!

You make me love chemistry !! I hope some teachers at my school could teach like you !! Thank you so much for your great video !! ^ ^

thanks allot man iam able to make it thorough high school chem thanks to u

Hi Mr. Rob! Your videos totally clarified some misconceptions i had earlier on in chem. THANK YOU! :D
May i know what's a more effective and interesting way of remembering the colours of various complex ions e.g [Cu(NH3)4(H2O)2]2+ is dark blue in colour and so on?