<span>ω(Fe) = M(2Fe) / M(в-ва) * 100% = (2 * 56 г/моль) / (2 * 56 г/моль + 3 * 16 г/моль) * 100% = 112 г/моль / 160 г/моль * 100% = 70%
</span>ω(O) = 100% - ω(Fe) = 100% - 70% = 30%
С6H12O6------->2C2H5OH+2CO2
n(C6H12O6)=5*2n(CO2)=10моль
<u><em>V(CO2)=10*22,4=224л</em></u>
2H3PO4+3Na2CO3----->2Na3PO4+3H2O+3CO2;
6H⁺+2PO4³⁻+6Na⁺+3CO3²⁻------>6Na⁺+2PO4²⁻+3H2O+3CO2;
6H⁺+3CO3²⁻------->3H2O+3CO2;
<span>C3H7COOK тв +KOH тв→ C3H8+K2CO3 (t)
C3H8+Cl2=C3H7Cl+HCl (УФС)
C3H7Cl+C2H5Cl+2Na=C5H12+2NaCl (t)
C5H12=C5H10+H2 (Ni t)
CH2=CH--(CH2)2-CH3+Cl2=CH2Cl-CHCl-(CH2)2-CH3</span>
Дано:
m(Cl) = 14,2 г
Cl2 + H2 = 2HCl
n(Cl2) = 2 моль
n(Cl2)/n(HCl) = 1
⇒n(HCl) = 2 моль * 1 = 2 моль
m(HCl) = n * M
M(HCl) = 36, 5
m(HCl) = 2 моль * 36,5 = 73 г