Theo đề bài, ta có:
\(\dfrac{M_{XY_3}}{M_{H_2}}=8,5\Rightarrow M_{XY_3}=8,5\cdot M_{H_2}=17\)
\(\%X=\dfrac{M_X\cdot100}{M_{XY_3}}\Rightarrow M_{XY_3}=\dfrac{\%X\cdot M_{XY_3}}{100}=\dfrac{82,35\cdot17}{100}\approx14\)
\(\Rightarrow M_Y=\dfrac{M_{XY_3}-M_Y}{3}=\dfrac{17-14}{3}=1\) Vậy, X thuộc nguyên tố Nitơ. KHHH: N Y thuộc nguyên tố Hiđro. KHHH: H