m-маса натрій нітрату
w= m*100/m()
20=m*100/(160+m)
3200 +20m=100m
100m-20m=3200
80m=3200m=3200/80=40г
<span>А) увеличение давления и уменьшение концентрации СO2
</span>
61.
P2O5+3H2O-->2H3PO4
H3PO4+3KOH-->K3PO4+3H2O
2K3PO4+Ca(OH)2-->Ca3(PO4)2+6KOH
2KOH+H2S-->K2S+2H2O
K2S+2HCL-->H2S+2KCL
62.
2H2S+3O2-->2H2O+2SO2
2SO2+O2-->2SO3
SO3+H2O-->H2SO4
H2SO4+Cu(OH)2-->CuSO4+2H2O
CuSO4+Na2S-->CuS+Na2SO4
63.
CuO+H2O-->Cu(OH)2
Cu(OH)2-->Cu+2H2O
Cu+S--> CuS
2CuS-t->Cu2S+S
Cu2S-->CuS+Cu
Cu + H2SO4(p) ≠
Zn + H2SO4 = ZnSO4 + H2
x/65 = 6.72/22.4;
x = (65*6.72)/22.4 = 19.5 грамм Zn
25 - 19.5 = 5.5 грамм Cu.
C2H6 + cl2 = c2h5oh + hcl
c2h5oh --cu--> ch3coh + h2
ch3coh --o--> ch3cooh
ch3cooh + cl2 = ch2clcooh +hcl
ch2clcooh + nh3 = nh2-ch2-cooh + hcl