<span>3MnS + 8HNO3 → 3Mn(NO3)2 + 3S + 2NO + 4H2O
S</span>²⁻ - 2e = S⁰ x3
N⁺⁵ + 3e = N²⁺ x2 (окислитель)
коэф. - 8
N2O Mr=(14*2+16*1)=44
H2SiO3 Mr=(1*2+28*1+16*3)=78
CuSO4 Mr=(64+32+16*4)=160
<span>CH3-CH2-COOH + MgOH --> CN3-CH2-COOMg + H2O
</span><span>CH3-CH2-COOH + Cl2 --> CH2Cl-CH2-COOH +HCl </span>
<span>CH3-CH2-COOH + C4H9OH --> CH3-CH2-COOC4H9 + H2O</span>