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Final Exam Review Worksheet - page 4 / 4

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8)How many grams of methane are there in 1.23 x 1024 molecules?

32.7 grams

9)How many grams of carbon dioxide will be made when 100 grams of methane burn in an excess of oxygen?

275 grams

10)If 45 grams of carbon dioxide were actually formed from the reaction in problem #9, what is the percent yield of this reaction?

16.4%

11)Name the intermolecular force most important for each of the following compounds:

a)ammonia hydrogen bonding

b)boron trichloride Van der Waals forces

c)hydrogen fluoride hydrogen bonding

For chemistry help, visit www.chemfiesta.com© 2002 Cavalcade Publishing, All Rights Reserved

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