....................................................................................................
M=M*n
n=N\Na
n=<span>18*10^23 \6*10^23=3 моль
</span>M(H2SO4)=98 г\моль
m(H2SO4)=98*3=294 г
А) С2H5NH2 + HOH = C2H5NH3OH
б) СH3 - CH(NH2) - COOH + NaOH = CH3 - CH(NH2) - COONa + H2O
в) CH2(NH2)-COOH + C3H7OH = CH2(NH2)-COOC3H7 + H2O