Nomenclature, molecular mass, moles help (attempted problems already)

[Edin_Dzeko]

Alright, below are screen captures of some work that I'm tackling. They show my attempts and answers at the problems. I would like to know whether I'm correct or wrong and how to correct the mistakes. The one I need most help with is, the one where you're given density and asked to find molecules. Help will be greatly appreciated. Thanks in advance.

http://img811.imageshack.us/img811/6668/molecules.jpg

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http://img18.imageshack.us/img18/9577/nomenclature1.jpg

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http://img845.imageshack.us/img845/9237/nomenclature2.jpg

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http://img27.imageshack.us/img27/3218/mm1nl.jpg

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[SteamKing]

How many grams of water are in one mole? (Hint: review the definition of a mole)

 

[Edin_Dzeko]

How many grams of water are in one mole? (Hint: review the definition of a mole)

would I have to calculate it as so:

H: 2x(1.008)
O: 1x(16.00)
--------------
H₂O:18.016 mol H₂0 ? and use that instead in the conversion factor?

What about my other problems. Are they okay?

 

[SteamKing]

You still are not understanding the concept of what a mole of a substance is.