<span>Са(ОН)2+СО2=СаСО3+Н2О
<span>
CaCO3 + 2HNO3 = Ca(NO3)2 + H2CO3</span></span>
1) C10H22 -----t----> C7H14 + C3H8
2) C7H14 + H2O ------t, H2SO4 (конц.)----> C7H15OH
3) C7H15OH + HBr -------><--------- C7H15Br + H2O
4) C7H15Br + KOH -----t-----> KBr + H2O + C7H14
5) C7H14 + H2 ------t, p, Ni------> C7H16
6) C7H16 -------t, Cr2O3-------> C7H14 + H2
7) C7H14 + H2O ------t, H2SO4 (конц.)----> C7H15OH
8) C7H15OH + 11O2 ---------> 7CO2 + 8H2O +Q
Ca+2H2O=Ca(OH)2+H2 вот так..
m(H2)=2*20/40=1г
2X+3Cl2 = 2XCl3
n(Cl)=6.72/22.4=0.3 моль
n(X)=0.3/3*2=0.2 моль
M(X)=5.4/0.2=27 г/моль
X - Al:
2Al+3Cl2 = 2AlCl3