[missaturn]

hi all

I have one qeustion.

How to change the C-12 scale to other scale eg other mass ??

Let say based on C-12 scale, oxygen has a mass of 16. Waht is the relative atomic mass based on chlorine (35.7)?

Thanks for the advice.

[Astrokel]

hey missaturn,

Use the actual mass of an atom divide by the actual mass of a chlorine atom. (or 1/x of the actual mass of a chlorine atom, if you wish)

But first you need to find out 1u = how much kg

Try this link out on why Carbon-12 http://www.newton.dep.anl.gov/askasci/chem00/chem00639.htm

[missaturn]

Do I need to use the "u" for the calculation?

Is it enough to use the "Use the actual mass of an atom divide by the actual mass of a chlorine atom" for the calculation?

[Astrokel]

Is it enough to use the "Use the actual mass of an atom divide by the actual mass of a chlorine atom" for the calculation?

Yes

Do I need to use the "u" for the calculation?

You need to covert u to the actual mass of an atom(you wish to compared against chlorine) and the actual mass of a chlorine atom in Kg, because 1u has been defined as 1/12 the mass of an atom of a C-12.

[missaturn]

Thanks.

I have been searching online for few days, I still couldnt get any formula.

Thanks alot.

[missaturn]

Hi

Do I have to divided by the mass of one atom chlorine or 1/x of Cl?
What is the x value? 335 or still 12?

[Astrokel]

hey!

Did you check out the link?

It's actually based on convention, you can define your own "u" as an atom of Cl-35 or 1/35 of Cl-35. It's up to you, but i would say chlorine is not a good element to compare against with.

Out of curiousity, what are you doing that for?

[missaturn]

It is a question from a text. I didnt know how to solve it.

Thanks..