2HNO3 + Mg = Mg(NO3)2 + H2
H⁺¹ +1e⁻ = H° 1| 2
2|
Mg° -2- = Mg⁺² 2| 1
1.2Ca+O2=2CaOCaO+H2O=Ca(OH)22.2Cu+O2=2CuOCuO+H2SO4=CuSO4+H2O3.4P+5O2=2P2O5P2O5+3H2O=2H3PO44.SO3+2KOH=K2SO4+H2O5.N2O5+2LiOH=2LiNO3+H2O<span>6.P2O5+3Ca(OH)2=Ca3(PO4)2+3H2O
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СН4+2О2=СО2+2Н2О. 2)nH2O=220:18=12моль. 3)nCH4=0,5nH2O=6моль 4)VCH4=6.22,4=134,4литров
C3H6+H2O=C3H7OH;кол-ва вещ-ва пропена=10.5:42==0.25моль
2C7H14 + 21O2 = 14CO2 + 14H2O
![\frac{m(C7H14)}{2*M(C7H14)} = \frac{m(O2)}{21*M(O2)} \\ m(O2)= \frac{m(C7H14)*21*M(O2)}{2*M(C7H14)} = \frac{1000*21*32}{2*98}=3428,57 ](https://tex.z-dn.net/?f=%20%5Cfrac%7Bm%28C7H14%29%7D%7B2%2AM%28C7H14%29%7D%20%3D%20%20%5Cfrac%7Bm%28O2%29%7D%7B21%2AM%28O2%29%7D%20%20%5C%5C%20%20m%28O2%29%3D%20%5Cfrac%7Bm%28C7H14%29%2A21%2AM%28O2%29%7D%7B2%2AM%28C7H14%29%7D%20%3D%20%20%5Cfrac%7B1000%2A21%2A32%7D%7B2%2A98%7D%3D3428%2C57%20%0A)
(г)
![PV= \frac{m}{M} RT =\ \textgreater \ V= \frac{mRT}{PM}](https://tex.z-dn.net/?f=PV%3D%20%5Cfrac%7Bm%7D%7BM%7D%20RT%20%3D%5C%20%5Ctextgreater%20%5C%20%20V%3D%20%5Cfrac%7BmRT%7D%7BPM%7D)
где R = 8,31 Дж/моль*К (универсальная газовая постоянная),
T - температура (в Кельвинах) = 11 + 273 = 284 К
m - масса кислорода воздуха, найденная ранее (3428,57 г)
![V = \frac{3428,57*8,31*284}{108002*32} = 2,34](https://tex.z-dn.net/?f=V%20%3D%20%20%5Cfrac%7B3428%2C57%2A8%2C31%2A284%7D%7B108002%2A32%7D%20%3D%202%2C34)
(метров куб.)