This week's book giveaways are in the Angular and TypeScript and Web Services forums.
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See this thread and this one for details.
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chemistry is cool

 
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I just bought a book. chem 301 and 302 at UT Austin. im into chemistry again. the most created substance in the world is sulfuric acid.
can you believe that? it is mostly used to make fertilizer
 
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How do you define "most created in the world"?  I mean, every animal creates H2O and CO2 when they breathe.  a quick google says a 70kg man exhales 400ml of water every day. Earth population is 7.4billion, but not all are adult males.  So let's just say half that, for rough calculation.  that works out to roughly 1.5billion liters of water, - just from human respiration - each day.

Now add in all the other animals on the planet, and water is looking pretty good.  Unles my math is off (which is quite possible).  
 
Randall Twede
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manufactured. I don't have the book with me right now , but it was billions of tons a year
 
Randall Twede
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I love this book by the way. I took a year of chemistry when I was in college the last time, but this book is different. not only is it upper division, but it is meant for chemistry majors. unlike my first year course. this book seems harder. and only $4 at goodwill
 
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