Calculez nr.moli hidrocarbura , care are masa molara:
M= (4X12gC + 8X1gH)/mol=56g/mol
niu= 1,12g/ 56g/mol= 0,o2mol C4H8
in 1mol hidrocarbura sunt 4 moli at C
0,02mol .........................niu= 0,08mol atC
1mol at are 6,023x10²³at
0,08mol .at......N= calculeaza