i asked you at school if you could put some Empirical Formula calculations on the site. i dont know if you have done, but i cant seem to find them anyway. could you direct me to them.
I hope this helps. There is a page of explanation and then three questions for you to try. The answers follow on the next page.
Your comments reminded me that I am going to make an index page for the A-level section (like the one for GCSE).
I don't understand optical fibres?
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