A poate fi o diena sau alchina
PV = nRT
p = m/V , n = m/M
=> PM = pRT => M = pRT/P
= 2,1243x0,082x(273+37)/1 = 54 g/mol
alcadiena sau alchina A = CnH2n-2
=> 14n-2 = 54 = > n = 4
=> A = C4H6
CH3-C≡C-CH3, 2-butina
B = CH2=CH-CH=CH2
C = CH2=C=CH-CH3
D = CH≡C-CH2-CH3