Đáp án:
CH≡CH + 2AgNO3 + 2NH3 --> CAg≡CAg ↓ + 2NH4NO3
x x
CH≡C-CH3 + AgNO3 + NH3 --> CAg≡C-CH3 ↓ + NH4NO3
y y
Ta có:
$\left \{ {{26x + 40y =8,6} \atop {240x + 147y = 36,05}} \right.$ => $\left \{ {{x=0,03} \atop {y=0,195}} \right.$
$mCH≡CH = 0,03.26 = 0,78 (g)$