"MIXTURE COMPOSITION BY ELEMENTAL ANALYSIS: SOLVING LINEAR SIMULTANEOUS EQUATIONS. Given a mixture of known compounds and known elemental weight percentages, one can calculate the weight percents of the various compounds by solving a set of linear simultaneous equations. There are 4 elements C, H, N and O. There are up to 4 compounds made from these elements. The stoichiometric coefficients of these compounds are C[i], H[i], N[i] and O[i]. For example, aspartic acid C4H7NO4 is written as C[1]=4, H[1]=7 N[1]=1 andO[1]=4. *** Answer(s) to Problem(s) **** (c) Copyright PCSCC, Inc., 1993The equations and data are included. Only active variables (Names followed by '=') are involved in the solution. Set XC%=47.7, XH%=6.3, XN=17.3 and O=28.7. TypeS to solve as linear. Results are X[1]=32.2%, X[2]=20.1%, X[3]=29.1 and X[4]=18.7. Type any key to exit. ||Determine the component compositions in a mixture of aspartic acid C4H7NO4; histidine, C6H9N3O2; phenylalanine; C9H11NO2 and arginine C6H14N4O2 if the elemental weight percents are C, 47.7%; H, 6.3%; N, 17.3% and O, 28.7%. (From Norris, A. C., op. cit.) Type comma key to see entire comment. Type (F2) to return to application file."
