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Mass spectrometry help?

Alltimesarah

Hello
I'm having problems with this question (d).Do you need to the formula? Also what's the Ar?
Thanks :smile:

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Reply 1

SyedaK

Original post by Alltimesarah

Hello
I'm having problems with this question (d).Do you need to the formula? Also what's the Ar?
Thanks :smile:

Posted from TSR Mobile

Ar is atomic mass. I don't knwo the answer but I would thinks it's because they're fragmentations of copper

Reply 2

GrimlyFish

Original post by Alltimesarah

Hello
I'm having problems with this question (d).Do you need to the formula? Also what's the Ar?
Thanks :smile:

Posted from TSR Mobile

The relative atomic mass of an element is an average defined by the abundance of it's isotopes. For Copper's Ar to be less than 64, the Cu-63 isotope must be more abundant than the Cu-65 isotope.

Reply 3

BJack

Original post by Alltimesarah

Hello
I'm having problems with this question (d).Do you need to the formula?

"A sample of copper" means an elemental sample. So the formula is just Cu. :tongue:

Reply 4

Alihassan

It's quite easy; the relative atomic mass is less than 64 meaning there are more Cu 63's than 65's. This means that in a given sample of copper there will most likely be more 63's so when tested it clearly showed peaks just less than 64.