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On analysis, a substance was found to have the following percentage composition: A = 32, B = 29 and O = 39 (At. mass of A=39 and B=35). The molecular mass of the substance is 244. Its molecular formula is |
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Answer» tell you the simplest trick to solve these problems for both school exams and MCQs.First look at the diagram and prepare a similar table.In the two rows, write ELEMENT name and atomic MASS as given in question.Then calculate value of Given Mass/Atomic mass in 3RD row.Finally try to FIND the simplest ratios between A, B and O.The ratio came as 2 : 2 : 3.So, empirical formula is :Now, So, MOLECULAR formula is also : |
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