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# Cambridge Chemistry Challenge watch

1. (Original post by Lutski)
This question doesn't seem to work. The Faraday Constant is 96485 A s / mol, and by research I found that the amount of aluminium they used at the top of the Washington tower is 2835g which is equal to 104.6 moles Al.

(Moles * Faraday's Constant) / Amps
= (104.6 * 96485) / 2 = 5046165.5 seconds
5046165.5 seconds => 58.4 days.

It's wrong...
You're forgetting something rather important

Hint:
Spoiler:
Show
Consider the charge change for Aluminium...
2. Who is on, or has done Rg?

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3. (Original post by Llewellyn)
You're forgetting something rather important
Please expand, I have literally no idea.
4. Silver, help?! Just one more hint... =/
5. (Original post by llewellyn)
you're forgetting something rather important

hint:
Spoiler:
Show
consider the charge change for aluminium...
do you mean al 3+ ion
6. (Original post by david2457)
Who is on, or has done Rg?

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The 53 is the best clue you'll get all night.

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7. so who is the fellow on the Rg image
8. (Original post by Lutski)
Please expand, I have literally no idea.
In Al203, each Al ion has a +3 charge, so for each to become atoms (0 charge), how many electrons must each gain?
9. (Original post by Silverland)
so who is the fellow on the Rg image
Henry

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10. So... Who's done silver?

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11. (Original post by Llewellyn)
In Al203, each Al ion has a +3 charge, so for each to become atoms (0 charge), how many electrons must each gain?
Oh, so Al must gain 3 electrons. I just multiply the moles of Al by three, then?
12. for Rg the person is Henry Moseley... that all I got
13. (Original post by vzapata)
for Rg the person is Henry Moseley... that all I got
Well what is he known for? How do you think this could this tie in with the numbers?
14. (Original post by Lutski)
Oh, so Al must gain 3 electrons. I just multiply the moles of Al by three, then?
Not quite.

The Faraday equation is A s per mol. You have 3 moles.
15. I don't know anything about x-ray spectra D:
16. (Original post by Couldxbe)
Not quite.

The Faraday equation is A s per mol. You have 3 moles.
I multiplied by three and it worked, thanks! :P
17. What is the operator and how does it work?

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18. in silver, I have to answer the reaction? if no, what? I dont understand how to answer!
19. (Original post by david2457)
What is the operator and how does it work?

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It's a product. (multiply)
20. any hints for rg, other than who he is?

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