Răspuns:
C5H12 pentan
r.at.C:H=5:12
r.m C: H=60:12=5:1
MC5H12=5×12+12=72g/mol
72gC5H12.......60gC......12gH
100gC5H12.......xgC..........ygH
x=100×60/72=calculează
y=100×12/72=calculează
izomeri C5H12 -pentan
CH3-CH2-CH2-CH2CH3
CH3-CH(CH3)-CH2-CH3
CH3
CH3-C-CH3
CH3
n-pentan
2-metilbutan
2,2-dimetilpropan
omolog inferior
CH3-CH2-CH2_CH3
butan
omolog superior
CH3-CH2-CH2-CH2-CH2-CH3
hexan
Explicație: