<span>А) Са(ОН)2
</span><span>Б) Fe
</span><span>Д) MgO.
</span><span>Сa(OH)2+CO2=CaCO3+H2O
</span>2 Fe + 3 CO2 = 3 CO + Fe2O3
<span>CO2+MgO=MgCO3 </span>
<span>2Na + 2H2O = 2NaOH + H2↑ </span>
<span>CuSO4 + 2NaOH → Cu(OH)2↓ + Na2SO4 </span>
<span>Cu(OH)2 =(нагрев) CuO + H2O</span>
<span><span>H3PO4+3KOH</span> = K3PO4</span><span> + 3H2O</span>
<span><span>H3PO4+3Na2O= <span>3H2O</span><span>+2Na3PO4</span></span></span>
<span><span><span><span>2K3PO4+3MgCl2=6KCl+Mg3(PO4)2</span></span></span></span>
<span><span><span><span><span>H3PO4+3AgNO3=3HNO3+Ag3PO4</span></span></span></span></span>
N = 27*10²¹
N = n * Na
27 * 10²¹ = n * 6.02*10²³;
n = 27 * 10²¹/6.02*10²³ = 4.48 моль
n = V/Vm;
4.48 = V/22.4;
V = 4.48 * 22.4 = 100.3 л
N=m/M
n(CO2)=125/44=2,8 моль
V=Vm*n=22,4*2,8=62,72 дм3