Question

Ex 6 si 7
Urgent!!
15 puncte !!
Mersi ❤️

Answer 1

6
Zn + H2SO4 = ZnSO4 + H2
M Zn = 65 g/mol
n = m/M = 13/65 = 0,2 moli Zn
M ZnSO4 = 161g/mol
M H2 = 2 g/mol
65 g Zn.........161 g ZnSO4.........2 g H2
13 g Zn.................x..........................y
x = 32,2 g ZnSO4
n = m/M = 32,2/161 = 0,2 moli ZnSO4
y = 0,4 g H2
n = m/M = 0,4/2 = 0,2 moli H2

7
3 Fe + 4 H2O = Fe3O4 + 4 H2
M H2 = 2 g/mol
M Fe = 56 g/mol
3*56 g Fe.......4*2 g H2
x................200 kg H2
x = 4200 kg Fe
n = m/M = 4200/56 = 75 kmoli Fe