Chemistry - Mole Concept Question with Solution | TestHub

B. 0.9 mol NO = 0.9 mol$\times 30$g$\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}=27$g NO
C. 22.4 L of${\mathrm{N}}_2=1$mol${\mathrm{N}}_2=28$g${\mathrm{N}}_2$
D.$6.02\times 10^{24}$molecules of oxygen = 10 mol oxygen
$=10\times \mathrm{32 }\mathrm{g}=\mathrm{320 }\mathrm{g\; of }{\mathrm{O}}_2$
Hence, here the least weight is of Mg.