1) Cu+4HNO3(конц)=>Cu(NO3)2+2NO2+2H2O
Cu+8HNO3(разб)=>3Cu(NO3)2+2NO+4H2O
с магнием также
<span> x 0.504</span>
<span>H</span>2<span>SO</span>4<span>(разб.) + Zn = ZnSO</span>4<span> + H</span>2<span>↑
</span> 65 22.4
x = 1.4625 гр
w(Zn) = 1.4625/1.485*100% = 98.48 %
Cr <span>1s</span>2 <span>2s</span>2 <span>2p</span>6 <span>3s</span>2 <span>3p</span>6 <span>4s</span>1 <span>3d</span>5
M(Na2O)=46+16=62g/mol
mNa=46g
H2SO3
HNO3
Fe(OH)3
Cu(OH)2
Mg(OH)2
H2CO3
KOH
H2SO4
H2SiO3
H3PO3