<u>Ca → CaO → CaCO₃ → CaCl₂.</u>
2Ca + O₂ = 2CaO
CaO + H₂CO₃ = CaCO₃ + H₂O;
CaCO₃ + 2HCl = CaCl₂ + CO₂↑ + H₂O.
Ch2=ch-ch2-ch2-oh
ch3-ch=ch-ch2-oh
ch3-ch2-ch=ch-oh
ch2=c(ch3)-ch2-oh
ch3-c(ch3)=ch-oh
<span>№7 (N) азот (электронная формула) </span><span>1s </span>²<span>2s </span>²<span>2p </span>³<u></u>
Al(NO3)3 + 3NaOH-->3NaNO3 + Al(OH)3
Al(3+)+3NO3+3Na(+1 )+3OH---> 3Na+3NO3+Al(OH)3 осадок
3C + 4HNO3 -> 3CO2 + 4NO + 2H2O
4Al + 3C -> Al4C3
2H2 + C -> CH4
C + O2 -> CO2
C + FeO -> Fe + CO