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    				| 1. | Isomers are different compounds that have the sameA. empirical formulaB. molecular formulaC. precentage compositionD. all of these | 
| Answer» Correct Answer - B Isomers contain the same numbers of the same kinds of atoms and hence have tha same molecular formula. Ethyne `(C_(2)H_(2))`and benzene `(C_(6)H_(6))` have the same percentage composition and same emirical formula but they are not isomers as they differe in molecular formula. | |