ADA 09 Help or maybe mistakes on test too?

[Member 8586]

I found some old threads on this, but just wanted some confirmation/verification/extra opinions on some that were never really "confirmed" mistakes....Also, help on a some please...if you can only answer one, thats completely fine..no need to feel obligated to answer all..any help is appreciated


BIO

• #9 - crazy cross ..I came up with no possible Black male and no possible Black female but they're both choices - I probably did the cross wrong though Idk
• #31 - i put epiphysis b/c I know epiphyseal plates are where growth occurs, and ADA has it as correct, but I saw forum members think metaphysis and wikipedia says "Epiphyseal plates ("growth plates") are located in the metaphysis and are responsible for growth in the length of the bone." ...so I guess its metaphysis?
  
  ..

CHEM

• #62 - pipet vs buret - this bothered me on Destroyer as well because I couldnt formulate a good definition for both because the explanations seem to contradict - anyone have an answer? I came up with pipet for transfer of measured volume, and buret for dispension of known amount...but either/or seems to work
• #67 - what the hell? I put B and have no idea why it's D
  
  ..

ORGO

• #80 - is it 120* because of the double bond next to it? i put 109.5 because it was among two single bonds?
• #84 - alcohols react with acids because alcohols behave as Bronsted Lowry bases... i can see how that makes sense because the acid would be the Bronsted acid...BUT if you react a carboxy acid + methonaol, the OH comes off the COOH & the H comes off the CH3OH, so wouldn't CH3OH be the Bronsted acid because it's donating the H? I think I may have some confusion on this..?
• #92 - I put B because OCH3 is a poor leaving group? why is it C with the NH2 group?
• #99 - WTH?? I wasn't even sure what this was totally asking, but I figured A looked good...why is it C?
• #100 - I apparently correctly guessed A but the 3rd pic seems to have 5 atoms bonded to the skeletal atom instead of 4?

my test is in 3 days, so any help is appreciated! thanks!

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[Member 8586]

bumpp..help pleaseee...test is in a few days

help with any would be greattt...especially 67,84,92

 

[theleatherwalle]

I found some old threads on this, but just wanted some confirmation/verification/extra opinions on some that were never really "confirmed" mistakes....Also, help on a some please...if you can only answer one, thats completely fine..no need to feel obligated to answer all..any help is appreciated


BIO

• #9 - crazy cross ..I came up with no possible Black male and no possible Black female but they're both choices - I probably did the cross wrong though Idk
• #31 - i put epiphysis b/c I know epiphyseal plates are where growth occurs, and ADA has it as correct, but I saw forum members think metaphysis and wikipedia says "Epiphyseal plates ("growth plates") are located in the metaphysis and are responsible for growth in the length of the bone." ...so I guess its metaphysis?
  
  ..

CHEM

• #62 - pipet vs buret - this bothered me on Destroyer as well because I couldnt formulate a good definition for both because the explanations seem to contradict - anyone have an answer? I came up with pipet for transfer of measured volume, and buret for dispension of known amount...but either/or seems to work
• #67 - what the hell? I put B and have no idea why it's D
  
  ..

ORGO

• #80 - is it 120* because of the double bond next to it? i put 109.5 because it was among two single bonds?
• #84 - alcohols react with acids because alcohols behave as Bronsted Lowry bases... i can see how that makes sense because the acid would be the Bronsted acid...BUT if you react a carboxy acid + methonaol, the OH comes off the COOH & the H comes off the CH3OH, so wouldn't CH3OH be the Bronsted acid because it's donating the H? I think I may have some confusion on this..?
• #92 - I put B because OCH3 is a poor leaving group? why is it C with the NH2 group?
• #99 - WTH?? I wasn't even sure what this was totally asking, but I figured A looked good...why is it C?
• #100 - I apparently correctly guessed A but the 3rd pic seems to have 5 atoms bonded to the skeletal atom instead of 4?

my test is in 3 days, so any help is appreciated! thanks!

#9: I don't have the practice test so I do not know
#31: this has been answered before use google

#62: pipette transfers small amounts of liquid, a burette doesn't
#67: i dont have practice test please be descriptive

#80: Yes
#84: http://www.google.com/imgres?um=1&h...w=178&start=0&ndsp=19&ved=1t:429,r:1,s:0,i:75 that will give you a visual of how its supposed to look.
#92: http://en.wikipedia.org/wiki/Leaving_group do you see the pattern?

#99,#100 no idea I don't have the test.

 

[tayloreve]

This makes me nervous seeing it had that many errors?

Does ADA give you points back if they review an exam and see that their answers are wrong? lol? o_o

 

[Member 8586]

bump! help for #92 please!

 

[theleatherwalle]

The more basic it is. the better leaving group it is.

 

[Member 8586]

The more basic it is. the better leaving group it is.

so NH2 is a better leaving group than OCH3 because the NH2 is more basic because its less stable with a negative charge on it?