1. <span> N2-0</span>
<span><span>AlCL3 </span><span>Al+3CL-1</span></span>
<span><span><span> HI <span> H+1 I-1</span></span></span></span>
<span><span><span><span><span>MgCO3 Mg+2C+4O-2</span></span></span></span></span>
<span><span><span><span><span><span>KClO3 </span><span>K+Cl+5O-2</span></span></span></span></span></span>
<span><span><span><span><span><span>2.овр</span></span></span></span></span></span>
M((NH4)2SO4)=132г/моль;
n((NH4)2SO4)=m/M=660/132=5 моль
1 моль (NH4)2SO4) - 2 моль (N)
5 моль (NH4)2SO4) - x
x=10 моль -n(N)
m(N)= 10*14=140 г
Ответ:140 г