Răspuns:
acid aspartic
C4H7NO4 formula moleculara
MC4H7NO4=4×AC+7×AH+AN+4×AO=4×12+7×1+14+4×16=133
133gC4H7NO4.......48gC......7gH.....14gN.....64gO
100gC4H7NO4.......agC........bgH......cgN......tgO
a=48×100/133=36,09 C
b=7×100/133=5,26 H
c=14×100/133=10,52 N
d=64×100/133=48,12 O
C=36,09%
H=5,26%
N=10,52%
O=48,12%