Christmas for the British is a more important holiday than the New Year. It is celebrated on November 25 according to the Catholic traditions associated with the difference between the Gregorian and Church calendars.
2.Beltane is a festival of fire, light and the beginning of the summer. The second name of Beltane – Walpurgis night.
3.Bonfire night is celebrated in honor of not the most rosy event in the history of great Britain. In the night of the fifth of November, in the year of 0.05, king Fox (leader of the Gunpowder plot) tried to blow up the house of London With the aim of destroying king James I.
4.Memorial day in the UK commemorate the soldiers who died in the First world war.
5. Istedod and fringe were the most ambitious festivals of song, dance, and other arts in Europe.
2Fe+O2= 2FeO
4P+5O2=2P2O5
2C2H2+5O2=4CO2+2H2O
С9H20 + 14O2 -> 9CO2 + 10H2O
3С2H2 = C6H6
найдем сначала теоретический выход продукта , то есть 100%-ный
M(C6H6) = 78 г/моль
Составим пропорцию
3 * 22.4 - 78
1.12 - x
x = 1.3 г - это 100% -ный выход,
теперь найдем 80% -ный выход
Составим пропорцию
1.3 - 100%
x = 80
x = 1.04 г
1. ZnO + 2HCl = ZnCl2 + H2O
Zn(OH)2 + 2HCl = ZnCl2 + 2H2O
2.FeO + 2HCl = FeCl2 + H2O
Fe(OH)2 + 2HCl = FeCl2 + 2H2O
3. MgO + 2HCl = MgCl2 + H2O
Mg(OH)2 + 2HCl = MgCl2 + H2O
4. Al2O3 + 6HCl = 2AlCl3 + 3H2O
<span>Al(OH)3 + 3HCl = AlCl3 + 3H2O</span>
