Na + H2 SO 4 > Na(SO)3+ H2O
Na+H2O ><span> NaO+H2</span>
1) CuO + CO = Cu + CO2
2) 3CuO +2 Al = 3Cu + Al2O3
2Fe + 3Cl2 → 2FeCl3
Mg + 2HBr → MgBr2 + H2
<span>2Al(OH)3 → Al2O3 + 3H2O
N2 + 3H2 → 2NH3 </span>
<span>2K + 2HCl → 2KCl + H2
2Ca + O2 → 2CaO </span>
2NaNO3 → 2NaNO2 + O2
2Li + 2H2O → 2LiOH + H2
H2 + CuO →Сu+ H2O
ZnCO3 → ZnO + CO2
<span>2P + 5Cl2 → 2PCl5
Na2S + CuCl2 → CuS + 2NaCl</span>
H2N-CH2-COOH+C2H5OH----(H2SO4)--->H2O + H2N-CH2-COOC2H5
H2N-CH2-COOH+CH3OH----(H2SO4)--->H2O + H2N-CH2COOCH3
Xg 33.6 L
Zn+H2SO4-->ZnSO4+H2
65 22.4
M(Zn)=65g/mol, Vm=22.4L/mol
1) находим массу чистого цинка
Х/65 = 33.6 / 22.4 Х=97.5г
2) находим массу цинка с примесями
m(Zn)=97.5+(97.5*2%/100%)=99.45 g
<span>ответ 99.45 г</span>