N的：(17×2)/(17×2+1×8+12+16×3)=33.33%
H的：(1×8)/(17×2+1×8+12+16×3)=7.85%
C的：12/(17×2+1×8+12+16×3)=11.76%
O的：(16×3)/(17×2+1×8+12+16×3)=47.06%