Question

Ma ajuta cineva la exercitiul 40???

Answer 1

alcanul are formula chimica generala CnH2n+2; prin ardere, da CO2 si H2O
1mol................(3n+1)/2mol
CnH2n+2  +  (3n+1)/2 O2-----> nCO2  + (2n+2)/2 H2
m,alcan= 1mol(12n+2n+2)g/mol= 14n+2   ,g

m,O2=( 3n+1)/2molx32g/mol= 16(3n+1) g

(14n+2)  :   16(3n+1)=   (7n+1): (24n+8)