Ответы и объяснения

2013-10-04T04:56:32+00:00
2013-10-04T09:52:49+00:00
Mr(NH3)=Ar(N)+Ar(H)*3=14+1*3=17
w(N)=Ar(N) / Mr(NH3) =14/17=0.8235=82.35%
w(H)=Ar(H)*3 /Mr(NH3) = 3/17=0.1764=17.65%
Ответ:w(N)=82.35%.w(H)=17.65%