A 10.0000 g block of aluminum is heated and placed in a stream of oxygen gas, resulting in the formation of aluminum oxide on the surface of the block.
The block is cooled and weighed and found to have a mass of 11.6471 g.
The block is then placed in a weak acid to remove the aluminum oxide layer from the block.
After a of the aluminum oxide is removed, the block is weighed and found to have a mass of 8.1471 g.
What is the empirical formula of aluminum oxide?
I know how to do the whole process for finding the empirical formula, but I am confused what is the mass of aluminum and what is the mass of oxygen that we start with?
I need to know this in order to multiply it by the molar mass.
2 answers
You didn't read my earlier response did you. Proof your post or you'll never get it answered. A word or some words are missing from the beginning of sentence 3.
OK. I see you did read my earlier post but didn't understand it. In sentence 3, "After a of the aluminum oxide is removed......" doesn't make sense. After a what is removed?
2 answers