Increasing order of number of moles of the species

i) 3 grams of NO

ii) 8.5 grams of ${\mathrm{PH}}_3$

 iii) 8 grams of methane is

(i) 3 gram NO $=\frac{3}{30}=0.1\mathrm{mole} \mathrm{moleules}$

(ii) 8.5 gram of ${\mathrm{PH}}_3=\frac{8.5}{34}=0.25 \mathrm{molecules}$

(iii) 8 gram ${\mathrm{CH}}_4=\frac{8}{16}=0.5 \mathrm{mole} \mathrm{molecules}$