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Cambridge Chemistry Challenge

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Reply 240

jennywren42681

I'm stuck on the last question - i know what all the compounds are and their formulae but apart from that...

Reply 241

syren1

can someone help me with the gold question?

Reply 242

Silverland

Original post by syren1

can someone help me with the gold question?

you'll want to find where those places are

the latitude and longitude are provided.
Then you just need to figure out what connects the places.

PM me if you need more help on Gold.

It's Rg that is melting my scinciput ¦D

If you think Gold is hard.... :wink:

Reply 243

Randophera

Silverland's right. Gold's nothing compared to Roentgenium. By the way, a clue about gold: it's something you might learn in A level biology, around the applications topics.

So....does anybody know how to do Rg? I've been trying ever possible combination of numbers. But I'm not exactly a university student who has in depth knowledge about spectroscopy. But....I think the middle value is 8. That's all I'm sure of, anybody else know what the molecule that looks like a man and the Rhodamine 123 cation (molecule on the right) are valued at?

Reply 244

distroyer

hey, what is that a picture of in the background of the Rg question?

Reply 245

warpsinski

Original post by distroyer

hey, what is that a picture of in the background of the Rg question?

I think it's about the mass spectrum.. But I'm not exactly sure...

Reply 246

Randophera

in my opinion...it looks more like an nmr spectrum

Reply 247

ncljess

If anyone knows the answer to rg can u message me :smile:

thx

Reply 248

Dyl63

Original post by jennywren42681

I'm stuck on the last question - i know what all the compounds are and their formulae but apart from that...

What is the formula for the bottom left compound?

Reply 249

david2457

Original post by ncljess

If anyone knows the answer to rg can u message me :smile:

thx

Same to me pleas. This has got to be the hardest challenge question so far. Unless im missing something really simple.

Reply 250

GreenLantern1

What is the answer to the entry levelquestion . I am STUCK!

Reply 251

chemistinthemaking

I'm stuck on silver. Can someone please help me?

Reply 252

USB

Original post by GreenLantern1

What is the answer to the entry levelquestion . I am STUCK!

Its got a bit to do with Physics...

P1b, if you do AQA.

Reply 253

Yetix

Original post by chemistinthemaking

I'm stuck on silver. Can someone please help me?

same, think ive over complicated it

Reply 254

david2457

Original post by Yetix

same, think ive over complicated it

Here is a bit of help. You need to use moles=mass/Mr. And you need to find the concentration of the HCl to be able to use moles=concentration*volume.

Reply 255

GreenLantern1

Original post by USB

Its got a bit to do with Physics...

P1b, if you do AQA.

It is alright. The correct answer has two words and I kept putting the second word. Boy I am such a fool. But now know. I simply forgot to put Iron in fornt of the second word!

Reply 256

chemistinthemaking

Original post by david2457

Here is a bit of help. You need to use moles=mass/Mr. And you need to find the concentration of the HCl to be able to use moles=concentration*volume.

But how do you know the Mr?

Reply 257

david2457

Original post by chemistinthemaking

But how do you know the Mr?

The statue is made of marble. The marble that is used is calcium carbonate. CaCO3. Hope that helps :smile:

Reply 258

USB

Original post by GreenLantern1

It is alright. The correct answer has two words and I kept putting the second word. Boy I am such a fool. But now know. I simply forgot to put Iron in fornt of the second word!