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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: straightexhaust on May 18, 2006, 03:34:34 PM

Title: A mol of bb's would cover the state of New Jersey to what depth?
Post by: straightexhaust on May 18, 2006, 03:34:34 PM
Hi,
   My teacher gave me a problem yesterday and i cant seem to fiqure out how to do it can anyone help please?

The question is "A mol of bb's would cover the state of New Jersey to what depth"

Any help would be appreciated
Title: Re: Chem question (confusing)
Post by: rctrackstar2007 on May 18, 2006, 05:15:18 PM
Hi,
   My teacher gave me a problem yesterday and i cant seem to fiqure out how to do it can anyone help please?

The question is "A mol of bb's would cover the state of New Jersey to what depth"

Any help would be appreciated

well for this you have to know the number of bb's in a mole (avogadro's number  ;) ) and the surface area of New Jersey

go from there
Title: Re: Chem question (confusing)
Post by: Borek on May 18, 2006, 05:29:22 PM
What's bb?
Title: Re: Chem question (confusing)
Post by: rctrackstar2007 on May 18, 2006, 05:36:25 PM
What's bb?

shooting bb's i think

sorry you also need the volume of a bb for this problem
Title: Re: Chem question (confusing)
Post by: mrdeadman on May 18, 2006, 05:52:15 PM
Hi,
   My teacher gave me a problem yesterday and i cant seem to fiqure out how to do it can anyone help please?

The question is "A mol of bb's would cover the state of New Jersey to what depth"

Any help would be appreciated
6.02*10^23 parts per mole. then find the area of NJ and the area that each bb takes up and go from there.
Title: Re: Chem question (confusing)
Post by: Borek on May 18, 2006, 05:56:32 PM
What's bb?

shooting bb's i think


Hardly helpfull. Note that English is my second language and I am about 8500 km from Colorado.

All I can think of is barbecue ;) although I think it is abbreviated bbq?
Title: Re: Chem question (confusing)
Post by: rctrackstar2007 on May 18, 2006, 05:58:59 PM
Hi,
   My teacher gave me a problem yesterday and i cant seem to fiqure out how to do it can anyone help please?

The question is "A mol of bb's would cover the state of New Jersey to what depth"

Any help would be appreciated
6.02*10^23 parts per mole. then find the area of NJ and the area that each bb takes up and go from there.

thank you for nearly quoting what i said  :o
Title: Re: Chem question (confusing)
Post by: rctrackstar2007 on May 18, 2006, 06:00:47 PM
What's bb?

shooting bb's i think


Hardly helpfull. Note that English is my second language and I am about 8500 km from Colorado.

All I can think of is barbecue ;) although I think it is abbreviated bbq?

that would be a very good thought and yes, bbq would be the abbrev. where do you live and what is your first language? just as a quick tangent
Title: Re: Chem question (confusing)
Post by: mrdeadman on May 18, 2006, 06:03:04 PM
Hardly helpfull. Note that English is my second language and I am about 8500 km from Colorado.
All I can think of is barbecue ;) although I think it is abbreviated bbq?
(http://www.compasseco.com/shop/images/CROSMAN%20057.jpg)
you feed them through this: (http://uplink.space.com/attachments/381587-AirSoftM9TwoTone.jpg)
these are CO2 powered bb guns.
Title: Re: Chem question (confusing)
Post by: Borek on May 18, 2006, 06:06:26 PM
No przecie? wszyscy wiedz?, ?e jestem polakiem ;)

Not a secret, I am from Poland.
Title: Re: Chem question (confusing)
Post by: rctrackstar2007 on May 18, 2006, 06:12:06 PM
straightexhaust, let us know once you figured it out and we can check it for you
Title: Re: Chem question (confusing)
Post by: edimerz on May 19, 2006, 12:05:12 AM
The area of NJ is :

7,836 sq miles / 20 295 sq kil

Can the BB be battleship (not chemistry but you can have its mole)!
Title: Re: Chem question (confusing)
Post by: mike on May 19, 2006, 12:33:41 AM
Areas: http://en.wikipedia.org/wiki/List_of_U.S._states_by_area
Title: Re: Chem question (confusing)
Post by: xiankai on May 19, 2006, 03:12:40 AM
bb sounds like ball bearings..
Title: Re: Chem question (confusing)
Post by: P on May 19, 2006, 04:54:33 AM
Definitely ball bearings!
Title: Re: Chem question (confusing)
Post by: edimerz on May 19, 2006, 05:54:18 AM
Ok, if it is ball bearings, then how we go ahead?
Title: Re: Chem question (confusing)
Post by: P on May 19, 2006, 06:00:32 AM
Estimate the dimentions of the bb  --  say 1 - 1.5 mm in diameter??    Work out the area 1 mole (6.02*10^23) of bbs would cover.  Divide this by area of the state to find out the number of layers of bbs you have  -  multiply by the diameter for the depth.
Title: Re: Chem question (confusing)
Post by: edimerz on May 19, 2006, 06:01:35 AM
This can be of help:
Search for BB in dictionary.com:

http://dictionary.reference.com/search?q=bb
Title: Re: Chem question (confusing)
Post by: edimerz on May 19, 2006, 06:09:20 AM
Sorry - but, ball bearings can be of different sizes (?), can  it be baseball (in general size is same).
Title: Re: Chem question (confusing)
Post by: Borek on May 19, 2006, 09:05:46 AM
Estimate the dimentions of the bb  --  say 1 - 1.5 mm in diameter??    Work out the area 1 mole (6.02*10^23) of bbs would cover.  Divide this by area of the state to find out the number of layers of bbs you have  -  multiply by the diameter for the depth.

Not so easy - distance between layers is not R (or 2r).
Title: Re: Chem question (confusing)
Post by: P on May 19, 2006, 11:33:12 AM
Not so easy - distance between layers is not R (or 2r).

Ahh...   I see where your coming from  -  are you suggesting they hexagonally close pack the layers on top of each other so that 3 layers for example would not equal to 3R!?   I think that this is fast becoming a maths/geometry question then!  the only chemistry really is the fact that 1 mole is 6.02 x 10^23.  I think I'm right in saying that you have to estimate the diameter of the bb though (otherwise the question is impossible)  - 

Sorry - but, ball bearings can be of different sizes (?), can it be baseball (in general size is same).

I certainly have never seen a baseball sized ball bearing. It would be quite heavy.
Title: Re: Chem question (confusing)
Post by: edimerz on May 19, 2006, 11:37:05 AM
Quote
I certainly have never seen a baseball sized ball bearing. It would be quite heavy.

Sure!
Title: Re: Chem question (confusing)
Post by: Borek on May 19, 2006, 11:45:39 AM
Ahh...   I see where your coming from  -  are you suggesting they hexagonally close pack the layers on top of each other so that 3 layers for example would not equal to 3R!?

Yep.