SOLUTION: A compound was analyzed and found to have the following percentage composition: aluminum, 15.77%; sulfur, 28.11%; and oxygen, 12.87%. Determine the empirical formula of salt.

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Question 1196140: A compound was analyzed and found to have the following percentage composition: aluminum, 15.77%; sulfur, 28.11%; and oxygen, 12.87%. Determine the empirical formula of salt.
Answer by ikleyn(53765) About Me  (Show Source):
You can put this solution on YOUR website!
.
A compound was analyzed and found to have the following percentage composition:
aluminum, 15.77%; sulfur, 28.11%; and oxygen, 12.87%.
Determine the empirical formula of salt.
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See the solution under this link

https://www.gusd.net/cms/lib/CA01000648/Centricity/Domain/1822/Act%20%208%204%20Molecular%20Form%20HydratKEY.pdf


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Notice that the last number in your post is  INCORRECT.

This number  MUST  BE  the complement to  100%  of the sum  15.77%  and  28.11%.


                It  CAN  NOT  be any other number.