Exercise E1  [ENDORSED]

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Nahal 1F
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Exercise E1

Postby Nahal 1F » Mon Jun 26, 2017 4:34 pm

For Exercise E1: The field of nanotechnology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms each of radius 144pm, into one of these fibers by encapsulating them in carbon nanotubes. How long would the fiber extend?

Do you just have to multiply 144 by 2?

Davalanya 1F
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Re: Exercise E1  [ENDORSED]

Postby Davalanya 1F » Mon Jun 26, 2017 6:06 pm

I believe that you have to change the units of 144 pm to meters first, then times it by 2. Using that answer you have to times it by 1.0 mole (6.0221*10^23) and finally, remember to convert your meters to kilometers.

hojae_lee_1C
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Re: Exercise E1

Postby hojae_lee_1C » Tue Jun 27, 2017 7:04 pm

first convert the moles into atoms, since the question gives you the radius of the atom. So use the Avogadro's number to convert 1 mole to 6.22 x 10^23 and from there multiply it by the diameter of the atom to determine the length of the fiber

Jennah Muhammad 1H
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Re: Exercise E1

Postby Jennah Muhammad 1H » Sun Jul 02, 2017 9:57 pm

I was a bit confused on this question as well (Im really rusty when it comes to chem)...how do you know to multiply by 2? when its not specified in the problem

Davalanya 1F
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Re: Exercise E1

Postby Davalanya 1F » Mon Jul 03, 2017 12:09 am

In order to get diameter, you have to times the radius by 2 because its twice the radius. that's where the 2 came from

Paula Dowdell 1F
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Re: Exercise E1

Postby Paula Dowdell 1F » Tue Oct 03, 2017 9:49 am

Is there any reason why you have to change pm to m? Do you typically change to m in most chemistry problems?

Adrian Lim 1G
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Re: Exercise E1

Postby Adrian Lim 1G » Tue Oct 03, 2017 3:08 pm

I believe it is okay to leave it in pm as long as you label your units. However, in chemistry, if you were to convert the pm to meters, it would probably be best to write your answer in scientific notation, considering the fact that a picometer is extremely small in comparison to a meter.


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