Answer
(a) 7.80 g
(b) 0.405 g
(c) 0.248 g
Work Step by Step
(a) $5.82\,L\,NO\times\frac{1\,mol\,NO}{22.4\,L\,NO}\times\frac{30.01\,g\,NO}{1\,mol\,NO}$
$= 7.80\,g$
(b) $0.324\,L\,N_{2}\times\frac{1\,mol\,N_{2}}{22.4\,L\,N_{2}}\times\frac{28.01\,g\,N_{2}}{1\,mol\,N_{2}}$
$=0.405\,g$
(c) $139\,cm^{3}\,Ar\times\frac{1\,L}{1000\,cm^{3}}\times\frac{1\,mol\,Ar}{22.4\,L\,Ar}\times\frac{39.948\,g\,Ar}{1\,mol\,Ar}$
$=0.248\,g$
