Незнаю но можно реакцией вытеснения сразу калий вытеснит медь и все))
<span>MgO+<span>H2O=Mg(OH)2</span></span>
<span><span><span>MgO+2<span>HNO3=Mg(NO3)2+H2O</span></span></span></span>
<span><span><span>Al2O3+6<span>HNO3=2Al(NO3)3+3H2O</span></span></span></span>
<span><span><em>Al2O3</em><span> + 3H2O = 2Al(OH)3 </span></span></span>
<span><span><span><span>Al2O3 + 2KOH + 3H2O = 2K[Al(OH)4]</span></span></span></span>
<span><span><span><span><span>Fe(OH)2+H2O=Fe(OH)3</span></span></span></span></span>
<span><span><span><span><span><em>Fe(OH)3 + 3KOH = K3[Fe(OH)6] </em></span></span></span></span></span>
<span><span><span><span><span><em><span> Fe(OH)2+2HNO3=<em>Fe(<em>NO3)2+2H2O</em></em></span></em></span></span></span></span></span>
<span><span><span><span><span><em><span><em><em><span>2KOH+<span>H2S =K2S+2H2O</span></span></em></em></span></em></span></span></span></span></span>
2C + O2 = 2CO - оксид углерода (II)
C + O2 = CO2 - оксид углерода (IV)
P.S. Углерод с кислородом образует не два оксида, а большое множество.
Mr (N2O3) = 76 а.е.м.
w (N) = 2*14/76 = 0,368 или 36,8%
w (O) = 3*16/76 = 0,632 или 63,2%
Fe2O3 + 3N2O5 = 2Fe(NO3)3