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# 2013 14 chapter 3

## on Sep 06, 2013

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## 2013 14 chapter 3Presentation Transcript

• Chapter 3 Basics Unit I, Lecture 2 1Friday, September 6, 13
• 2Friday, September 6, 13
• 6.02 x 1023 2Friday, September 6, 13
• 3Friday, September 6, 13
• K2CrO4 3Friday, September 6, 13
• K2CrO4 3Friday, September 6, 13
• K2CrO4 K=40.27% 3Friday, September 6, 13
• K2CrO4 K=40.27% Cr=26.78% 3Friday, September 6, 13
• K2CrO4 K=40.27% Cr=26.78% O=32.96% 3Friday, September 6, 13
• Percent to mass Mass to moles Divide by small Multiply until whole 4Friday, September 6, 13
• 5Friday, September 6, 13
• What is the simplest formula of a compound containing 26.6%K, 35.4% Cr, 38.0% O? 5Friday, September 6, 13
• What is the simplest formula of a compound containing 26.6%K, 35.4% Cr, 38.0% O? K2Cr2O7 5Friday, September 6, 13
• Hint: First ﬁnd the mass of C. Then ﬁnd the mass of H in the sample. Finally ﬁnd the mass of O by difference. A certain organic acid (C,H, O atoms) weighing 1.00 g burns to give 1.466 g CO2 and 0.6001 g H2O. Find the simplest (empirical) formula. 6Friday, September 6, 13
• http://www.affordablewildliferesponse.com/animals/moles-and-pocket-gophers http://commons.wikimedia.org/wiki/File:Chroman_draselný.JPG https://techie-teacher-wanna-be.wikispaces.com/Classroom+Technology http://www.corinaharold.com/gallery/The-Simpsons/Homer_remembering http://commons.wikimedia.org/wiki/File:Formaldehyde-3D-balls.png http://fearschemistry.wikidot.com/potassium-dichromate 7Friday, September 6, 13