Posted by Nicky on Monday, November 16, 2009 at 9:59pm.
The empirical formula is based on moles and not grams.
Al2O3 means 2 molecules of Al have combined with 3 molecules of oxygen. (Multiplying molecules by 6.022 x 10^23 converts each to a ratio of 2 moles to 3 moles. Since Avogadro's number is constant we need not multiply the molecules by that number). As opposed, it is NOT 2 grams Al combined with 3 grams O but 2 molecules of Al combined with 3 molecules of O.
Related Questions
chemistry - When 1.24g of an organic compound with the formula CxHyOz is burned ...
chemistry - 1.to calculate the percent by massof an element in a known compound...
Chemistry - Xenon of mass 5.08 g reacts with fluorine to form 9.49 g of a xenon ...
Chemistry - what is the molecular formula of a compound that is 54.5% C, 9.09% H...
Chemistry - Please check my answers for the following questions. THANK YOU. 1) ...
Chemistry (Check) - True or False The empirical formula of a compound is always ...
chemistry - I need help with this problem... A 1.208 g sample of a compound ...
chemistry - In the course of research, a chemist isolates a new compound with an...
chemistry- empirical formulas - Calculate the empirical formula of a molecule ...
AP Chemistry - An organic compound was synthesized and found to contain only C, ...
For Further Reading
