100g substanta.........43,75gN.......50gO........6,25gH
64g.....................................x.....................y....................z
x= 28g-----> niu= m/M= 28g/14g/mol= 2molN
Y=32g----------------------niu= 32g/16g/mol= 2mol O
z= 4g.............................niu= 4g/1g/mol=4molH
H4N2O2