Răspuns :

Vlad157799id
Salut!

C8H18

MC8H18=114g/mol

Etina este C2H2
MC2H2=26 g/mol
n=m/M=>m=20•26=520 grame C2H2
520g...........xC
26...............24C
x=480 grame C in C2H2

114........96gC
x............480gC
x=570 grame de C8H18
n=570/114=5moli de compus A (C8H18)





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