Solutions to Problems of Appendix

EMPIRICAL FORMULA EMPIRICAL FORMULA WEIGHT ( MOLECULAR WEIGHT EMP. FORM. WT. MOLECULAR 1 FORMULA 

3 If we assume that we have a 100-g sample, the amounts of the elements are 

The empirical formula is thus Ci6HigN2S04. The empirical formula weight (334.4) is within the range given for the molecular weight (330 10). Thus, the molecular formula for penicillin G is the same as the empirical formula. 

4 (a) To calculate the percentage composition from the molecular formula, first determine the weight of each element in 1 mol of the compound. For C6H12O6, 

Then determine the percentage of each element nsrng the formnla Weight of A 

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APPENDIX A EMPIRICAL AND MOLECULAR FORMULAS 663 SOLUTIONS TO PROBLEMS OF APPENDIX A... 

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