1) Соляная кислота
2) Хлорэтан
Zn + 2 HCl = ZnCl2 + H2
n H2 = V/Vm = 246/(1000*22,4) = 0,011 моль
По уравнению реакции n Zn = 0.011 моль
m Zn = n*M = 0.011*65 = 0.715 г
p Zn = m/V = 1000*0.715/100 = 7.15 г/см3
<span>4CuI + 5H2SO4 → H2S +</span>2I<span>2</span><span> + 4CuSO4 </span>+<span>4H2O</span>
⠀ ⠀ ⠀Br
⠀ ⠀ ⠀|
CH3-CH-C=CH-CH2-CH2-CH2-CH3
⠀ ⠀ ⠀ ⠀ /
⠀ ⠀ ⠀ C3H7
W(Fe) = Ar(Fe) * n / Mr(Fe2O3) *100% = 56 * 2 / 160 *100% = 70%
W(O) = Ar(O) * n / Mr(Fe2O3) *100% = 16 * 3 / 160 *100% = 30%