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# Cambridge Chemistry Challenge watch

1. 2.21 am and still stuck on silver. Joy.
2. (Original post by WiJay43)
Its binomial expansions, like nCr and (p+q). Its C2 maths. Cant really teach you tbh, the final answer range is quite large though. Im gunna have to go now however, sorry.
Thank you so much for your hint - I GOT IT! I can finally sleep now; thanks again aahh!
3. I feel so stupid now after I have worked out the answer to chemistry as I used that chemical in one of my experiments but I was told not to care about it so I forgot about it
4. But what's the population size for the distribution?

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5. (Original post by WiJay43)
Its binomial expansions, like nCr and (p+q). Its C2 maths. Cant really teach you tbh, the final answer range is quite large though. Im gunna have to go now however, sorry.
But what's the population size???

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6. I'm still stuck on copper, i can't get front the date to the Mr, and i can't find the answer looking up 'Skylab Mr'
7. Help for Rg:
Spoiler:
Show
The value for the abundance of the N15 isotope is 0.364% this can be translated as the probability of a nitrogen being N15 then have fun with the binomial distribution for a while.
8. No idea what silver is asking
9. (Original post by Chemistry 456)
No idea what silver is asking
Yep stuck on silver to
10. (Original post by Chemistry 456)
No idea what silver is asking
How did you get to the Mr on Cu?
11. (Original post by john smilth)
Yep stuck on silver to
How did you get to the Mr on Cu? Please help
12. (Original post by gmseahorse)
Help for Rg:
Spoiler:
Show
The value for the abundance of the N15 isotope is 0.364% this can be translated as the probability of a nitrogen being N15 then have fun with the binomial distribution for a while.
Yeah been trying that all night

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13. (Original post by Chemistry 456)
No idea what silver is asking
(Original post by john smilth)
Yep stuck on silver to
It's very loosely to do with the colours if that helps
14. (Original post by rabirabbit)
How did you get to the Mr on Cu?
The french place is la rochelle
15. (Original post by Diamond Crafter)
The french place is la rochelle
I got the place as Droux, with a date, but I don't know what to do...
16. Now on gold woo nearly there!!
17. (Original post by john smilth)
Now on gold woo nearly there!!

Yay for you. Any helpful tips on silver?
18. (Original post by john smilth)
Now on gold woo nearly there!!
19. (Original post by rabirabbit)
I got the place as Droux, with a date, but I don't know what to do...
Trust me the place is La Rochelle
20. (Original post by Diamond Crafter)
Trust me the place is La Rochelle
Thanks got it now

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