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02-04-2008, 10:42 PM
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#1 (permalink) |
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Platinum Member
 
Join Date: Jan 2007
Location: Chatham, New York
Age: 17
Posts: 939
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homework help
hey guys, i need help with chemistry...which i suck at
 3)Explain in words and calculations how you determined the number of moles of Mg (magnesium) and O (oxygen) that reacted. How did you determine their molar ratio and their accepted molar ratio? Mass of Mg reacted = .3g moles of MG reacted = 8mol help meh please  :con fused::con fused:
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02-04-2008, 11:03 PM
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#2 (permalink) |
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Diamond Member
 
Join Date: Sep 2007
Location: EHT, NJ
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Ooo...chemistry! And moles, to boot! It's been a while, but I think I need more info. Is there anything else relevant to that question?
Mol = weight of sample (g) / molar weight (g/mol)
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--Jay Gigabyte EP31-DS3L | E4500 | Masscool HSF paired with AS-5 80 GB SATA2 x 2 | e-GeForce 7100 GS | CM Elite 330 (gorgeous!) Triple Boot: Ubuntu 7.10/XP Home/Kubuntu 7.10 You do realize that everytime PC eye Posts, God kicks a puppy, and every time someone takes his advice, He smothers a kitten in front of a child, right? http://www.computerforum.com/114761-...tml#post922619 |
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02-04-2008, 11:13 PM
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#3 (permalink) |
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Platinum Member
Join Date: Jan 2007
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here's a decent sized data table:
Mass of dry crucible plus cover: 24.8g Mass of Crucible, cover, and Mg: 24.9g mass of crucible, cover, and product: 25g (first heating (time elapsed 1 minute)) constant mass of crucible, cover, and product: 25g Mass of MG reacted: .3 moles of MG reacted: 8mol mass of product: .3
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02-04-2008, 11:23 PM
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#4 (permalink) |
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Platinum Member
Join Date: Jan 2007
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Age: 17
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nevermind guys, i got it, thanks for the help
 ***there should be a thread for this sort of thing, as a good number of us are still in school (whether it be middle, high school, or college)***
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02-05-2008, 12:04 AM
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#5 (permalink) |
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Diamond Member
Join Date: Sep 2007
Location: EHT, NJ
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Does your chemistry teacher celebrate Mole Day?
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--Jay Gigabyte EP31-DS3L | E4500 | Masscool HSF paired with AS-5 80 GB SATA2 x 2 | e-GeForce 7100 GS | CM Elite 330 (gorgeous!) Triple Boot: Ubuntu 7.10/XP Home/Kubuntu 7.10 You do realize that everytime PC eye Posts, God kicks a puppy, and every time someone takes his advice, He smothers a kitten in front of a child, right? http://www.computerforum.com/114761-...tml#post922619 |
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02-05-2008, 12:07 AM
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#6 (permalink) |
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Platinum Member
Join Date: Jan 2007
Location: Chatham, New York
Age: 17
Posts: 939
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no, he doesnt...what day is that, maybe we wont have to do anything
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