Question

Va rog e urgent dau test!!!

Answer 1

Răspuns:

l.

1) 2H3PO4 + 3Mg(OH)2=> Mg3(PO4)2+6H2O

II

1) MgO + H2O => Mg(OH)2

2) 2Fe +3Cl2=> 2FeCl3

3) CO2 + H2O => H2CO3

4) N2+3H2=> 2NH3

5) H2+ I2=> 2HI

6) 4Na+ O2=> 2Na2O

III.

2moli 3moli

2Fe + 3Cl2 => 2FeCl3

10moli xmoli

x=10×3/2=15moliCl2

IV.

100gFe........56g Fe pur

600gFe.......ygFe pur

y=600×56/100=336gFe pur

MMFe56g/mol

MFeCl3=56+3×35,5=162,5g/mol

2×56g 2×162,5g

2Fe + 3Cl2 => 2FeCl3

336g m=?

m=336×2×162,5/2×56=calculează