1.а)S+O2=SO2
б)4P+5O2=2P2O5
в)3Mg+N2=Mg3N2
2.а)2Ca+O2=2CaO
б)2Na+Cl2=2NaCl
в)4Cr+3O2=2Cr2O3
г)2Cl2+O2=2Cl2O
3.2Mg+O2=2MgO
N2+3H2=2NH3
2Fe+3Cl2=2FeCl3
2HgO=2Hg+O2
4.2Ca+O2=2CaO соединение
2KClO3=2KCl+3O2 разложение
2NO+O2=2NO2 соединение
Pb(NO3)2+Zn=Zn(NO3)2+Pb замещение
2NaOH+H2SO4=Na2SO4+2H2O обмен
CaO+H2O=Ca(OH)2 соединение
Маса розчину = 175+5 = 180. Рахуємо масову частку 5/180 = 0.028 або 2.8%
M(H2SO4)= 2*1+32+16*4=98 г/моль
M(Al(OH)3)= 27 + 16*3 + 1*3 = 78 г/моль
<span>Li<span>, </span>Rb<span>, </span>K<span>, </span>Ba<span>, </span>Sr<span>, </span>Ca<span>, </span>Na<span>, </span>Mg<span>, </span>Al<span>, </span>Mn<span>, </span>Zn<span>, </span>Cr<span>, </span>Fe<span>, </span>Cd<span>, </span>Co<span>, </span>Ni<span>, </span>Sn<span>, </span>Pb</span><span>, </span><u>H</u><span>, </span><span>Sb<span>, </span>Bi<span>, </span>Cu<span>, </span>Hg<span>, </span>Ag<span>, </span>Pd<span>, </span>Pt<span>, </span><span>Au слева направо уменьшается активность </span></span>