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November 08, 2025, 06:58:37 am
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Author Topic: Unit 3 Questions MEGATHREAD :)  (Read 64910 times)  Share 

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DisaFear

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #270 on: June 10, 2011, 11:07:58 pm »
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The word spectra is a plural of spectrum
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taiga

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #271 on: June 10, 2011, 11:08:29 pm »
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It's the actual graph :)
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mickeymouse

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #272 on: June 10, 2011, 11:10:40 pm »
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does anyone know where the hydrogen on the deoxyribose sugar went in the heinemann textbook diagrams? the one opposite the HOCH2? confused...
« Last Edit: June 10, 2011, 11:13:56 pm by mickeymouse »
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DisaFear

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #273 on: June 10, 2011, 11:20:30 pm »
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This? (page 205)

What's wrong with it? Or do you mean in a reaction?
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jane1234

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #274 on: June 11, 2011, 12:17:08 am »
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Quote from: Lols123 on June 10, 2011, 10:40:46 pm
LOL Jane
I just did that one
It almost made me depressed until I read this thread xD
how did you go on it? ^^

Haha lost about 15 marks :( So around 80%
I like the confidence-booster ones better :D
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luken93

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #275 on: June 11, 2011, 09:26:11 am »
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Disulfide Link/Bridge - Both ok?

Also, should we provide catalysts wherever possible in a reaction?
« Last Edit: June 11, 2011, 09:28:17 am by luken93 »
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SDPHD

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #276 on: June 11, 2011, 09:34:03 am »
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Okay, this is quite an idiotic question, sorry.

What is the molar mass of this?



More specifically, what is the name and molar mass of this?



I cant get this question right because my molar mass is off.
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mickeymouse

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #277 on: June 11, 2011, 09:45:49 am »
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Quote from: DisaFear on June 10, 2011, 11:20:30 pm
This? (page 205)
(Image removed from quote.)
What's wrong with it? Or do you mean in a reaction?

yup that one but after a reaction with another nucleotide the H disappears on page 206?

edit: I think I get it now there is no need to draw the other hydrogens anymore since it's still present by just drawing the ring
« Last Edit: June 11, 2011, 10:37:39 am by mickeymouse »
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luken93

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #278 on: June 11, 2011, 09:56:52 am »
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Quote from: SDPHD on June 11, 2011, 09:34:03 am
Okay, this is quite an idiotic question, sorry.

What is the molar mass of this?

(Image removed from quote.)

More specifically, what is the name and molar mass of this?

(Image removed from quote.)

I cant get this question right because my molar mass is off.
Okay, so the molar mass of benzene is C6H6 = 78g/mol

However, for every bond that it makes with someone else, the Hydrogen is lost. So, for the diagram above, there are two bonds to benzene, hence it would become C6H4.

I'm assuming this is where you went wrong, let me know if you still can't get it :)
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SDPHD

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #279 on: June 11, 2011, 10:06:14 am »
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Quote from: luken93 on June 11, 2011, 09:56:52 am
Okay, so the molar mass of benzene is C6H6 = 78g/mol

However, for every bond that it makes with someone else, the Hydrogen is lost. So, for the diagram above, there are two bonds to benzene, hence it would become C6H4.

I'm assuming this is where you went wrong, let me know if you still can't get it :)

Oh right!

I get it now, thanks!
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homosapiens

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #280 on: June 11, 2011, 10:24:20 am »
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Is the order of polarity for organic molecules from least polar to most polar:
alkenes, alkanes, ether, ester, amine, carboxylic acids, alcohols, amide?
And if so, why are alkenes less polar than alkanes...
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luken93

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #281 on: June 11, 2011, 10:28:55 am »
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Phosphates in the data book, why do some exams say it contains OH while the data book shows O-?
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mickeymouse

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #282 on: June 11, 2011, 10:36:20 am »
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how many H environments in this molecule? CH3(CH2)3CH3

I thought there were 2 environments but the answer says 3?
« Last Edit: June 11, 2011, 10:38:07 am by mickeymouse »
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homosapiens

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #283 on: June 11, 2011, 10:37:47 am »
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Quote from: luken93 on June 11, 2011, 10:28:55 am
Phosphates in the data book, why do some exams say it contains OH while the data book shows O-?

Not entirely sure, so someone please correct me if I'm wrong, but phosphate groups usually have OH but once bonded to form a nucleotide, they become O-, that's why DNA molecules are negatively charged
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mickeymouse

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Re: Unit 3 Questions MEGATHREAD :)
« Reply #284 on: June 11, 2011, 10:38:49 am »
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Yes that's right phosphates usually have an OH after bonding there remains an O
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