Помогите написать цепочку уравнений C6H6-----C6H5------C2H5--------CO2

) C2H6 =(t; Cr2O3) C2H4 + H2
2) C2H4 =(t; Cr2O3) C2H2 + H2
3) C2H2 + H2O =( Hg(2+); H(+) ) CH3COH
4) CH3COH + H2 =(Ni) C2H5OH + H2O
5) C2H5OH + CH3OH =(tlt;150; H2SO4(конц) ) C2H5-O-CH3 + H2O
6) C2H5-O-CH3 + HI = CH3OH + C2H5I
7) CH3OH + HCl lt;=gt; CH3Cl + H2O
8) CH3Cl + C3H7Cl + 2Na = C4H10 + 2NaCl
9) C4H10 =(Cr2O3; t) C4H8 + H2
10) C4H8 + H2O =(H3PO4) C4H9OH
11) C2H2+H2 =(t; Ni) C2H4 
C2H4+HCl = C2H5Cl
12) nC2H5Cl =(t: Ni) ( -CH(Cl) - CH2- )n
13) C2H6 + Br2 =(t) C2H5Br + HBr
14) 2C2H5Br + Na = C4H10 + 2NaBr
15) C4H10 + 2,5O2 =(p; катализатор) 2CH3COOH + H2O
16) CH3COOH + C3H7OH =(H2SO4) CH3COOC3H7 + H2O
17) CH3COOC3H7 =[H] C3H7OH +CH3COOH (На деле берут Zn и HCl, т.к. в 1-ые моменты их р-ции выделяется атомарный водород.)
18) C3H7OH + Na = C3H7ONa + 0,5H2
19) CH3COOH + NaOH = CH3COONa + H2O
20) 2CH3COONa + H2SO4 = 2CH3COOH + Na2SO4
2CH3COOH + Mg(OH)2 = (CH3COO)2Mg + 2H2O