Răspuns:
formula moleculara restransa C9H6O6
miu=108+6+96=>210g/mol
210g acid.....108gC......6gH.......96gO
100...................X................Y............Z
X=100X108/210% C=.......
Y=100X6/210%H=....
Z=100X96/2105O=.....
Explicație:
FINALIZEAZA CALCULELE !!!
