Homework Question Edition 6 E1

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Esther Ahn 4I
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Homework Question Edition 6 E1

Postby Esther Ahn 4I » Wed Oct 03, 2018 9:22 pm

For question E1, you have to find how long the fibers extend, given that you string together 1.00 mol Ag atoms, each of a radius of 144pm. For my answer I got 8.67 x 10^13 m. The solution manual gives us the final answer in kilometers. I was just wondering why the answer is given in kilometers and not meters because I thought that meters are considered the base unit.

Abby De La Merced 3F
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Re: Homework Question Edition 6 E1

Postby Abby De La Merced 3F » Wed Oct 03, 2018 9:28 pm

I am also struggling with trying to figure out why the conversion works out like that as well. I am also confused about why 144pm is multiplied by 2 when doing the dimensional analysis method on the problem too.

amogha_koka3I
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Re: Homework Question Edition 6 E1

Postby amogha_koka3I » Wed Oct 03, 2018 11:24 pm

We multiply 144 by 2 because 144pm is the radius and we want the diameter of the atom.

Sophia Ding 1B
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Re: Homework Question Edition 6 E1

Postby Sophia Ding 1B » Thu Oct 04, 2018 10:26 am

I think the answer is given in kilometers because in class we learned that the SI fundamental unit for distance is kilometers (km), but I am also with you on generally answering in meters! I feel like most answers in the solution manual has units of meters, so I'm not sure how pressing this matter is of using kilometers.

rikolivares
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Re: Homework Question Edition 6 E1

Postby rikolivares » Thu Oct 04, 2018 12:05 pm

I assume it was just to underscore the large number, but I don't think there would be any problem if you answered in meters in a question like this for a quiz or test. I think meters is always the safest bet.


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