- H2O = 18g/mol
%H = 2/18*100% = 11.11%
%O = 88.89%
- H2SO4 = 98g/mol
%H = 2/98*100% = 2.04%
%S = 32.65%
%O = 65.31%
- C2H5OH = 46g/mol
%C = 24/46*100% = 52.17%
%H = 13.04%
%O=34.79%
- CH3COOH = 60g/mol
%C = 24/60*100% = 40%
%H = 6.67%
%O = 53.33%
- CnH2n+2 = 14n + 2 g/mol
%C = 12n/(14n+2)*100%
%H = 2(n+1)/2(7n+1)*100% = n+1/7n+1 *100%
- FexOy =56x + 16y = 4( 14x + 4y) g/mol
%Fe = 56x/4(14x+4y)*100% = 14x/(14x+4y)*100%
%O = 16y/4(14x+4y) *100% = 4y/(14x+4y)*100%