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  • I'm in college at the University of Pennsylvania, and you are A MILLION times better than my teacher. THANK YOU!! My professor doesn't even speak English.

    msnnbc 2 months ago

  • @msnnbc maybe they would consider hiring me oneday LOL....i speak southern lol

    whitwellhigh 2 months ago

  • @whitwellhigh I'm from Texas so no problems here. Happy holidays sir!

    msnnbc 2 months ago

  • very explaining video for mol fraction and calculation

    bozayicik 4 months ago

  • this is good thank you

    chemi2010able 6 months ago

  • This is actually helpful!!! THANKS :]

    TACT1CsMAN 9 months ago

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