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Determine the empirical formula of compound if its percentcomposition is 75 perc

ID: 679252 • Letter: D

Question

Determine the empirical formula of compound if its percentcomposition is 75 percent carbon and 25 percent hydrogen. AtomicMass C-12 H-1 and A 14.4 g sample of a compound known to contain only iron andoxygen FexOy was analyzed and found tocontain 11.2 grams of iron. Find the simplest empirical formula ofthis compound. Find X and Y. Determine the empirical formula of compound if its percentcomposition is 75 percent carbon and 25 percent hydrogen. AtomicMass C-12 H-1 and A 14.4 g sample of a compound known to contain only iron andoxygen FexOy was analyzed and found tocontain 11.2 grams of iron. Find the simplest empirical formula ofthis compound. Find X and Y.

Explanation / Answer

      C                H         75%             25 %      75/12             25/1          6.25                25 divide with least number   6.25/ 6.25      25 /6.25       1                        4    So the emperical formula of compound is CH4 part B percent of iron in the compound = (11.2 / 14.4 )x 100                                                     = 77.7         percentof oxygen = 100-77.7 = 22.3 %            Fe                  O          77.7 %             22.3%                 77.7 /55.85          22.3 /16         1.39                      1.39          1             :          1         Thesimplest emperical formula of the compound is FeO                 X = Y = 1 part B percent of iron in the compound = (11.2 / 14.4 )x 100                                                     = 77.7         percentof oxygen = 100-77.7 = 22.3 %            Fe                  O          77.7 %             22.3%                 77.7 /55.85          22.3 /16         1.39                      1.39          1             :          1         Thesimplest emperical formula of the compound is FeO                 X = Y = 1
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