Дано
w(C) = 53% = 0.53
w(H) = 16% = 0.16
D(He) = 11.25
CxHyNz
Решение
w(N) = 1 - w(C) - w(H) = 1 - 0.53 - 0.16 = 0.31
D(He) = Mr(CxHyNz) / Mr(He) = Mr(CxHyNz) / 4 = 11.25
Mr(CxHyNz) / 4 = 11.25
Mr(CxHyNz) / 4 = 11.25
Mr(CxHyNz) = 45
x = Mr(CxHyOz)w(C) / Ar(C) = (45 * 0.53) / 12 = 2
y = Mr(CxHyOz)w(H) / Ar(H) = (45 * 0.16) / 1 = 7
z = Mr(CxHyOz)w(N) / Ar(N) = (45 * 0.31) / 14 = 1
x : y : z = 2 : 7 : 1
Ответ: C2H7N