Question

Un compus organic contine 82.75%C si 17.25%H si are masa moleculara 58. Care e formula moleculara

Answer 1

calculez masa C si H din 58g compus

100g compus.........82,75gC.........17,25gH

58g.....................m= 48g...................m=10g

calculez moli C, H din masele obtinute, stiind M,C= 12g/mol    M,H=1g/mol

niu,C= m/M= 48g/12g/mol= 4molC

niu =m/M= 10g/1g/mol= 10molH

F.MOLECULARA este C4H8