M(<span>C2H2) = 26 г/моль
</span>V=Vm*n
n=V/Vm = 0,224/22,4= 0.01 моль
m= M*n = 26*0.01=0.26 г<span>
р=m/V = 0.26/0.224 = 1.1607</span>
Si + 2NaOH + H2O = Na2SiO3 + 2H2↑;
Mr(Si)=28;
V=22,4*2=44,8л;
28 г Si ---44,8 л H2;
x г Si ---89,6 л H2;
x=89,6*28/44,8=56 г
150 - 100 %
55 - x%
x150 = 55 × 100
× = 55 × 100
150
x = 36 2
3
2NaOH + H2SO4=Na2SO4 + H2O
2NaNO3+ZnSO4=Na2SO4 + Zn(NO3)2