Răspunsuri

Cel mai inteligent răspuns!
2014-06-11T18:10:00+03:00
PV=nr moli * R * T => nr moli H2 = 0,615*1/0,082 * 300 => nr moli H2 = 0,025 moli
x HCl + Me ---> MeClx + H2
A g Me....... 1 mol H2
1,4 g Me.......0,025 moli H2
0,025A = 1.4=>A = 56 => fierul
2 HCl + Fe ---> FeCl2 + H2