Two Formula Mass Calulations

Question 1

What are the 5 stages of finding the empirical formula of a compound?

Answer 1

1) list all the elements in the compound
2) write their experimental masses
3) divide each mass by the relative atomic mass for that element
4) turn the numbers into a simple ratio to get all whole numbers
5) get the ratio in it’s simplest form

Question 2

How do you calculate the percentage mass of an element in a compound?

Answer 2

% mass = (relative atomic mass x number of atoms)/relative formula mass