Question

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Answer 1

1.a -------    degajare--------
   b ------- reactanti--------

2. 
    1Ca +2H2O=1 Ca(OH)2 +1 H2
1+2+1+1=5

3.
SO3 +H2O=H2SO4
2Fe( OH)3 =Fe2O3 +3H2O
CaO +2HCl= CaCl2 +H2O
2K + 2H2O=2 KOH +H2

4.
2Fe(OH)3 =Fe2O3 +3 H2O
N2+O2= 2NO

5.  yg             85 g
  N2 +3H2 =2 NH3
  2.14g          2.17g
MNH3=14+3=17--------1mol=17g
17 gNH3------------1mol NH3
Xg---------------------5 moli
x=17.5=85 g NH3
y=2.14.85:2.17=70 g NH3