A) `N_(2)+3H_(2)rarr2NH_(3)` `(0.2)/(1)lt(0.7)/(3)impliesN_(2)` is LR B) `H_(2)+2CrarrC_(2)H_(2)` `((1//2))/(1)lt((24//12))/(2)impliesH_(2)` is LR C) `2C+O_(2)rarr2CO` `((0.5//12))/(2)lt((2.24//22.4))/(1)impliesC` is LR D) `2H_(2)+O_(2)rarr2H_(2)O` `((2//2))/(2)gt((2//32))/(1)impliesO_(2)` is LR
