Мr(NaNO3) = 23+14+16*3=85
w(N) = 14/85 =16%
Mr(KNO3) = 39+14+16*3=101
w(N) = 14/101 =14%
Mr(Ca(NO3)2) = 40+2*14+16*6=164
w(N) = 2*14 / 164 = 17%
ОТВЕТ Са(NO3)2
Мr(NaNO3) = 23+14+16*3=85
w(N) = 14/85 =16%
Mr(KNO3) = 39+14+16*3=101
w(N) = 14/101 =14%
Mr(Ca(NO3)2) = 40+2*14+16*6=164
w(N) = 2*14 / 164 = 17%
ОТВЕТ Са(NO3)2