Question

un compus organic conține 85,71% C si 14,29% H si are masa molara 28. Calc formula bruta si cea moleculara. Ac=13 Ah=1

Answer 1

calculez numrul de moli nde atomi, stiind A.c=12g/mol, stiind M,H=1g/mol

nC= 85,71/12= 7,14

nH= 14,29/1=14,29     IMPART PRIN CEL MAI MIC---> f.bruta  C1H2

f.moleculara (CH2)n

nx14=28---> n=2---- > C2H4   ETENA