In the mole pdf with answers, there are many small formatting errors. In many of the slides the exponents are shift and are on top of other numbers. Also many of the multiple choice questions have formatting error with the bullet points. 

Thank you for alerting us to these issues with the PDF.  Unfortunately, when we upload the SMART notebook files, the automatic PDF converter sometimes creates formatting issues.  I believe they are corrected now; however the PDFs still may not look perfect.  Please let us know if there are specific slides that are still difficult to read.

Question 21 on slide 42 has the wrong question. The question that is provided asks "How many hydrogen atoms are in six molecules of ethylene glycol,...?" The formula for ethylene glycol is given as HOCH2CH2OH. The correct answer of 36 atoms of H is given as choice B. However, the slide and the solution presented in the video is choice D. Which to achieve that answer the solution requires a step that is not necessary for the question asked. 

Thanks for the correction John. The answer should indeed be B. The presentation will be corrected and the video rerecorded. Again, thanks for taking the time to give us the feedback!

Please check the answers for the Molar Volume, Molar Mass, and Avogadro’s # practice problems # 66 a & b

James-thank you for the correction. Rather than updating the answer key, I updated the amount given in the problem but all has been corrected and updated now. -Rebbeca