- #1

mutineer123

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## Homework Statement

http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_s11_qp_12.pdf

question 10

## Homework Equations

## The Attempt at a Solution

The way I am doing it, is to get two equations in terms of x and y and then equate them. For the first equation I used the fact that all of the element's individual atomic masses will add up to 571.5. So i got 27x + 28.1y = 172

My problem now is how to get the second equation? I think it has something to do with the empirical formula, but I can't figure it out. Help!